informal

adjective

in·​for·​mal (ˌ)in-ˈfȯr-məl How to pronounce informal (audio)
Synonyms of informalnext
1
: marked by the absence of formality or ceremony
an informal meeting
2
: characteristic of or appropriate to ordinary, casual, or familiar use
informal clothes
informality noun
informally adverb

Examples of informal in a Sentence

We had an informal meeting over lunch. He has an informal manner that puts people at ease. He spoke to them in informal Spanish. The term is common in informal contexts. He took an informal poll among his coworkers.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Food and drink Head to Cugino for breakfast or an informal lunch. Condé Nast, Condé Nast Traveler, 31 Mar. 2026 Democratic Senators Jeanne Shaheen (New Hampshire) and Jacky Rosen (Nevada) and Republican Senators John Curtis (Utah) and Thom Tillis (North Carolina) on Monday met with Taiwanese President Lai Ching-te at the start of a two-day trip focused on bolstering the two sides’ informal ties. ABC News, 30 Mar. 2026 Sherwood’s presentation was informal; the company is waiting on a reply for the state, and has applied for no local wetlands or zoning permits so far. Don Stacom, Hartford Courant, 30 Mar. 2026 Government immigration policies are reducing this informal caregiver group at exactly the demographic tipping point. Tom Wolzien, MSNBC Newsweek, 29 Mar. 2026 See All Example Sentences for informal

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of informal was in the 15th century

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Cite this Entry

“Informal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/informal. Accessed 4 Apr. 2026.

Kids Definition

informal

adjective
in·​for·​mal (ˈ)in-ˈfȯr-məl How to pronounce informal (audio)
1
: not formal
an informal party
2
: suited for ordinary or everyday use
informal clothes
informality noun
informally adverb

Legal Definition

informal

adjective
in·​for·​mal
: marked by the absence of required forms or procedures or by the relaxation of prescribed rules
an informal hearing

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