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.
Lunch is often an informal affair—poke bowls from Da Poke Bowl Shack, tacos from El Jefe, or something quick from Knosh or Takeaway 242 between pool and beach. Condé Nast, Condé Nast Traveler, 7 Apr. 2026 Lykke Leonardsen, who runs Copenhagen’s Resilient and Sustainable City Solutions program and serves as the city’s informal water ambassador, told me that the intent was to hold hearings, win approval in August, and invest gradually. Eric Klinenberg, New Yorker, 6 Apr. 2026 Following these delays, and increasing questions from other council members, Crain has asked city staff to complete an informal report on data centers. Emily Holshouser, Fort Worth Star-Telegram, 6 Apr. 2026 The six-bedroom residence measures about 8,500 square feet with both formal reception rooms and informal living spaces. Abby Montanez, Robb Report, 6 Apr. 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 8 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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