INFORMAL Synonyms: 85 Similar and Opposite Words

informal

adjective

(ˌ)in-ˈfȯr-məl

Definition of informal

as in unconventional

not rigidly following established form, custom, or rules an informal meeting allowed everyone to get acquainted

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in casual

not designed to be worn only on special occasions chose an informal flowery dress

Synonyms & Similar Words

Antonyms & Near Antonyms

as in colloquial

used in or suitable for speech and not formal writing the use of informal language in a scholarly article is really inappropriate

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Antonyms & Near Antonyms

Example Sentences

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Recent Examples of informal Some, whose families can afford it, attend clandestine informal schools in neighborhood homes. — The Christian Science Monitor, Christian Science Monitor, 17 Aug. 2026 Next to the family room is the spacious kitchen with a breakfast nook for informal dining. — James Alexander, Hartford Courant, 16 Aug. 2026 Loomis residents will have an opportunity to connect directly with Town Manager Carl Simpson during an informal community gathering later this month. — Nicole Buss, Sacbee.com, 16 Aug. 2026 Seaweed is an informal name for the many kinds of marine algae that grow along seashores. — Encyclopedia Britannica, 14 Aug. 2026 See All Example Sentences for informal

Recent Examples of Synonyms for informal

Adjective

Despite the unconventional nature, both Ray J and Brown likely walked away with significant earnings from the Zeus Promotions event.

— Brian Mazique, Forbes.com, 16 Aug. 2026
After using unconventional tactics, such as water-dropping helicopters, LAFD crews knocked down the fire and returned the property to Lineage for cleanup.

— Matthew Rodriguez, CBS News, 14 Aug. 2026

Definition of unconventional

Adjective

Silent sleep apnea is a colloquial term for the form of the condition that occurs without the loud, disruptive snoring most people associate with it.

— Hanna Wickes, Miami Herald, 4 Aug. 2026
Wilson’s translation has come under fire for her decision to render Homeric Greek into a direct, colloquial English.

— Harrison Jacobs, ARTnews.com, 22 July 2026

Definition of colloquial

Adjective

Screenplay credits are shared by Damodaran, Joses Imona, and Jennifer Litau, with Litau also handling Tok Pisin and vernacular-language translation duties.

— Naman Ramachandran, Variety, 17 July 2026
Compiled in 1964 by Elektra Records founder Jac Holzman, this four-LP, 83-track box set was intended as an accessible survey of the roots and branches of American vernacular music.

— Ted Olson, The Conversation, 2 July 2026