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Definition of solid

solid

/ˈsɑː.lɪd/
sol · id

Adverb:solidly
•
Plural:solids
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solid Lexical Profile

solid Game Scores & Validity

• adjective

1

Firm and stable in shape; not liquid or fluid, and not hollow or containing spaces or gaps.

Example

"Wait until the melted chocolate cools and becomes solid before removing it from the mold."


2

Dependable, reliable, or financially sound; of good and substantial quality.

Example

"The research team presented a solid argument supported by decades of empirical data."


3

Having the same substance, color, or material throughout; uniform and unpatterned.

Example

"The antique dining table is crafted from solid oak rather than a thin veneer."


4

Continuous and uninterrupted for a specified period of time.

Example

"After traveling all day, she slept for ten solid hours."


5

Having three dimensions (length, breadth, and thickness); relating to three-dimensional geometric figures.

Example

"The architecture students began the semester by studying solid geometry and spatial modeling."

Synonyms
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Antonyms
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• noun

1

A substance or object that is firm and stable in shape, rather than liquid or gaseous.

Example

"In basic physics, matter is commonly classified into solids, liquids, and gases."


2

Food that is not liquid, especially when introduced to an infant or recovering patient (usually used in the plural).

Example

"The pediatrician recommended gradually introducing soft solids into the baby's diet at six months."


3

A three-dimensional geometric figure or body having length, breadth, and thickness, such as a cube, sphere, or pyramid.

Example

"A regular polyhedron is a geometric solid whose faces are all identical regular polygons."


4

North American A generous favor or helpful act performed for someone (slang, usually in the phrase 'do someone a solid').

Example

"Could you do me a solid and cover my afternoon shift this Friday?"

Synonyms
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Antonyms
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• adverb

1

Without spaces, gaps, or interruptions; completely or continuously.

Example

"The popular downtown restaurant is booked solid for the entire holiday weekend."

Synonyms
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Antonyms
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• Rhymes for solid

Word Origin & Etymology

Borrowed in the late 14th century from Old French solide, which comes from Latin solidus ('firm, whole, undivided, entire'), sharing a Proto-Indo-European root with words meaning 'whole' or 'safe' (and also the ultimate source of the word 'soldier', originally one paid in solidus gold coins).

Cite this Entry


Wordmom. (2026). Definition of Solid. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/solid
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