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Definition of mouthful

mouthful

/ˈmaʊθ.fʊl/
mouth · ful
Plural:mouthfuls
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mouthful Lexical Profile

mouthful Game Scores & Validity

• noun

1

A quantity of food or drink that fills or can be put into the mouth at one time.

Example

"She took a small mouthful of the hot soup to test its temperature."

2

A long or complicated word or phrase that is difficult to say.

Example

"The scientific name of the newly discovered bacterium is quite a mouthful."

3

An important, insightful, or lengthy remark (used especially in informal contexts).

Example

"When you said the project needed better leadership, you certainly said a mouthful."

Synonyms
View all synonyms for mouthful

Word Nuance & Usage

Both "mouthfuls" and "mouthsful" are recognized plural forms, though "mouthfuls" is overwhelmingly preferred in modern English.

• Nearby Words

mouth
mouthbreather
mouthfeel
mouthful
mouthguard
mouthiness
mouthpiece

Word Origin & Etymology

From Old English muþfull, formed from muþ ("mouth") and the suffix -full, denoting the quantity required to fill a container.

Cite this Entry

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