Antonyms for Hollow: 10 Useful Opposites

The Opposite of Hollow at a Glance

The most direct antonym of hollow is solid. When hollow means having an empty space inside, solid means completely filled with material. Depending on context, other opposites include full, filled, substantial, meaningful, sincere, and genuine.

Quick Answer

Solid is the main antonym of hollow when describing a physical object.

For example:

• Hollow: The pipe is hollow inside.
• Solid: The pipe is solid throughout.

However, hollow also has figurative meanings. A hollow promise may be meaningful, sincere, genuine, or substantial, depending on what the sentence emphasizes.

Hollow and Its Antonym

Word	Meaning	Example
Hollow	Empty inside	The tree trunk is hollow.
Solid	Completely filled with material	The wooden beam is solid.
Full	Containing as much as possible or expected	The bottle is full of water.
Substantial	Large, solid, or significant in amount or value	The proposal offers substantial benefits.
Meaningful	Having real significance or value	She gave a meaningful response.
Sincere	Genuine and honestly expressed	His apology was sincere.

Meaning in Brief

Hollow: having an empty space inside; figuratively, lacking real value, meaning, or sincerity.

Main antonym: solid having a firm structure with no empty space inside.

What You’ll Learn

• The main opposite of hollow
• Other opposites for its physical and figurative meanings
• How solid, full, substantial, meaningful, and sincere differ
• Which antonym fits different contexts
• How to use these words naturally

Common Opposites of Hollow

1. Solid

Solid is the clearest and most direct antonym of hollow in physical contexts.

A solid object has material throughout its interior rather than an empty space.

Example:
The statue is made from a solid block of stone.

Best for: objects, materials, structures, and physical shapes.

2. Full

Full can contrast with hollow when the focus is on something containing material or contents rather than being empty.

Example:
The container was full of sand rather than hollow inside.

Best for: containers, spaces, rooms, and things containing something.

Important distinction: Full and solid are not always interchangeable. A bottle can be full of water but is not itself a solid object.

3. Filled

Filled means containing something that occupies an empty space.

Example:
The hollow pipe was filled with concrete.

Best for: spaces, containers, holes, and structures that have been filled.

4. Substantial

Substantial can be an opposite of hollow when hollow means lacking real substance, value, or importance.

Example:
The revised plan contains substantial improvements.

Best for: ideas, arguments, plans, achievements, benefits, and amounts.

5. Meaningful

Meaningful contrasts with hollow when something lacks significance or emotional value.

Example:
Her words were meaningful and gave everyone hope.

Best for: words, actions, conversations, experiences, and relationships.

6. Sincere

Sincere is a useful contextual opposite when hollow describes words that are insincere or merely spoken without genuine feeling.

Example:
He offered a sincere apology for his mistake.

Best for: apologies, promises, compliments, statements, and expressions of feeling.

7. Genuine

Genuine means real, authentic, or sincerely felt.

Example:
The manager showed genuine concern for the employees.

Best for: feelings, concern, emotions, intentions, reactions, and statements

8. Authentic

Authentic means genuine, real, or true rather than artificial or false.

Example:
The speaker gave an authentic account of her experience.

Best for: experiences, stories, objects, voices, expressions, and cultural products.

9. Rich

Rich can contrast with hollow in figurative contexts when something contains abundant meaning, detail, emotion, or content.

Example:
The novel has a rich and detailed history.

Best for: writing, experiences, discussions, cultures, descriptions, and ideas.

10. Profound

Profound can serve as a contextual opposite when hollow means lacking depth or serious meaning.

Example:
The book offers profound insights into human nature.

Best for: ideas, statements, observations, insights, and experiences.

Different Meanings, Different Opposites

The opposite of hollow changes because the word has several meanings.

When Hollow Means “Empty Inside”

Use physical opposites such as:

• solid
• full
• filled

Example:
The log is hollow inside.
→ The log is solid inside.

Here, solid is the strongest direct opposite.

When Hollow Means “Lacking Real Meaning”

Use:

• meaningful
• substantial
• profound
• rich

Example:
His speech sounded hollow and offered no useful ideas.
→ His speech was substantial and offered useful ideas.

When Hollow Means “Insincere”

Use:

• sincere
• genuine
• authentic

Example:
Her apology sounded hollow.
→ Her apology sounded sincere.

The exact opposite depends on whether the emphasis is on truthfulness, emotional honesty, or authenticity.

How These Antonyms Differ

Solid vs. Full

Solid means made of material throughout or firm in structure.

Full means containing something to a particular extent.

• The wall is solid.
• The tank is full.

A container can be full without being solid.

Solid vs. Substantial

Solid is usually physical when used as a direct opposite of hollow.

Substantial is often figurative and suggests real value, importance, size, or strength.

• a solid wooden door
• a substantial argument

Meaningful vs. Sincere

Meaningful emphasizes significance or value.

Sincere emphasizes honesty and genuine feeling.

• Her gift was meaningful because it reminded me of my childhood.
• Her apology was sincere because she genuinely regretted her actions.

Genuine vs. Authentic

These words overlap strongly, but genuine often emphasizes that something is real or sincerely felt, while authentic can emphasize originality or faithfulness to the real thing.

• genuine concern
• authentic experience
• genuine emotion
• authentic traditional food

Examples in Context

Physical Meaning

• The tree has a hollow trunk.
• The metal rod is solid.
• The container is full of water.
• The empty space was filled with concrete.

Figurative Meaning

• His promise sounded hollow.
• Her apology was sincere.
• The discussion was meaningful.
• The report contained substantial evidence.
• The novel presents a profound idea.
• Their conversation was rich with useful insights.

What Part of Speech Is It?

Hollow can function as an adjective, noun, verb, and, less commonly, an adverb.

For this antonym article, its adjective uses are the most important.

Adjective

Hollow describes something empty inside or lacking substance.

• a hollow tree
• a hollow promise

Its common adjective opposites include:

• solid
• full
• substantial
• meaningful
• sincere
• genuine

Noun

A hollow can mean a small valley or depression, especially between hills.

Example:
The village lies in a wooded hollow.

This meaning has a different semantic relationship, so solid is not an antonym of hollow when hollow is being used as a noun for a valley.

Common Errors to Avoid

Mistake 1: Using “solid” for every meaning of hollow

❌ Her hollow apology was solid.

This is unnatural because solid does not normally mean sincere.

✅ Her hollow apology was insincere.

Or:

✅ Her apology was sincere.

Mistake 2: Treating “full” and “solid” as exact synonyms

A container may be full, while an object may be solid.

❌ The bottle is solid with water.

✅ The bottle is full of water.

Mistake 3: Using “genuine” for physical objects

❌ The hollow pipe is genuine.

Genuine concerns authenticity or sincerity, not whether an object has an empty interior.

✅ The hollow pipe is solid.

Usage Tip

When you see hollow, first ask what kind of emptiness it describes:

Physical emptiness → solid, full, filled

Lack of substance → substantial, meaningful, profound

Lack of sincerity → sincere, genuine, authentic

This makes it easier to choose a precise antonym instead of using solid in every situation.

Quick Antonym Quiz

1. The old tree is hollow, but the new wooden post is ______.

A. sincere
B. solid
C. meaningful

Answer: B. solid

Solid is the direct physical opposite of hollow.

2. His apology sounded hollow, but her apology was ______.

A. sincere
B. full
C. sturdy

Answer: A. sincere

Here, hollow means lacking genuine feeling, so sincere is the appropriate opposite.

3. The article was not hollow or superficial; it contained ______ analysis.

A. brittle
B. substantial
C. empty

Answer: B. substantial

Substantial means having real value, importance, or content.

Frequently Asked Questions

What is the main antonym of hollow?

The main antonym of hollow is solid when hollow means empty inside. For example, a hollow pipe has an empty interior, while a solid pipe or rod has material throughout.

What is the opposite of hollow in a figurative sense?

The best figurative opposite depends on the meaning. Meaningful, substantial, profound, sincere, and genuine can all contrast with different figurative uses of hollow.

Is full an antonym of hollow?

Full can be a contextual antonym when the contrast is between an empty space and one containing something. However, full is not a universal opposite of hollow.

What is the opposite of a hollow promise?

A sincere, genuine, or meaningful promise can contrast with a hollow promise. The best choice depends on whether the emphasis is on honesty, genuine intention, or significance.

Can solid always replace hollow?

No. Solid is the strongest direct opposite when hollow describes physical emptiness. It does not naturally replace the word in figurative expressions such as hollow apology or hollow promise.

What to Remember

Solid is the clearest antonym of hollow when something is physically empty inside. But figurative uses require more precise opposites.

• Solid → not empty inside
• Full / filled → containing something
• Substantial → having real value or content
• Meaningful → having significance
• Sincere → honestly and genuinely expressed
• Genuine → real or sincerely felt
• Profound → deep in meaning or thought

The key lesson is simple: choose the opposite according to the meaning of hollow in the sentence.

Antonyms for Dry: 15 Useful Opposites