colloquial

American  

[kuh-loh-kwee-uhl] / kəˈloʊ kwi əl /

adjective

1. characteristic of or appropriate to ordinary or familiar conversation rather than formal speech or writing; informal.

   Antonyms:

   formal

2. involving or using conversation.

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colloquial British  

/ kəˈləʊkwɪəl /

adjective

1. of or relating to conversation

2. denoting or characterized by informal or conversational idiom or vocabulary Compare informal

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Related Words

Colloquial, conversational, informal refer to types of speech or to usages not on a formal level. Colloquial is often mistakenly used with a connotation of disapproval, as if it meant “vulgar” or “bad” or “incorrect” usage, whereas it is merely a familiar style used in speaking and writing. Conversational refers to a style used in the oral exchange of ideas, opinions, etc.: an easy conversational style. Informal means without formality, without strict attention to set forms, unceremonious: an informal manner of speaking; it describes the ordinary, everyday language of cultivated speakers.

Other Word Forms

• colloquiality noun
• colloquially adverb
• colloquialness noun
• quasi-colloquial adjective
• quasi-colloquially adverb
• semicolloquial adjective
• semicolloquially adverb
• uncolloquial adjective
• uncolloquially adverb

Etymology

Origin of colloquial

First recorded in 1745–55; colloquy + -al ¹

Explanation

Colloquial language is casual and conversational: it's the difference between "What are you going to do?" and "Whatchagonnado?" The word colloquial comes from the Latin word colloquium, which means "speaking together." The roots are the prefix com-, which means "together," and the suffix -loqu, which means "speak." Some may think that colloquial language is not good, when in fact it may just not be appropriate for the context. While it is OK to be colloquial and chatty with friends, it is not acceptable to be colloquial in an essay for school or work.

Example Sentences

“Hyperscalers are situationships, not spouses,” Rezaei wrote in a Tuesday note, referencing a colloquial term for romantic entanglements lacking clear boundaries and formal commitment.

From MarketWatch • Mar. 17, 2026

In coarse, colloquial prose, translated by Kate Webster, these loosely united vignettes glance upon the lives of villagers who seem cursed by the land.

From The Wall Street Journal • Feb. 26, 2026

In subsequent years, voting has played only a part in the choices, which have included 2023's "rizz" -- a colloquial term defined as "style, charm, or attractiveness" -- and last year's "brain rot".

From Barron's • Dec. 1, 2025

"Most Australians would know if you said 'speaks bogan' or 'bogan Australian' that the language would be highly informal with many slang and colloquial words and phrases, including uniquely Australian ones."

From BBC • Nov. 14, 2025

“Can’t, might set the black damp off,” the old miner said, using the colloquial term for methane.

From "October Sky" by Homer Hickam

Related Words

• conversational
• vernacular