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.
If anything, Coop studies people, studies groups of folks and systems, and how informal and formal systems of specific societies interact. Jerald “coop” Cooper, Los Angeles Times, 13 Apr. 2026 Yet under Presidents Xi Jinping and Vladimir Putin, China and Russia have sought to increase their footprint in the region through a variety of formal alliances and informal measures. Jeffrey Taliaferro, The Conversation, 11 Apr. 2026 The comments from Iranian officials come after reports of a more informal system of fees. Ben Weiss, Fortune, 10 Apr. 2026 The emerging cooperation has opened the door for American companies to explore opportunities in Venezuela’s mineral-rich south, even as governance on the ground remains dominated by armed groups and informal networks. Antonio María Delgado, Miami Herald, 9 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 16 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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