informal

adjective

in·​for·​mal (ˌ)in-ˈfȯr-məl How to pronounce informal (audio)
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.
Meanwhile, many women around the world are still struggling to find work, with many holding precarious jobs or forced to hustle in the informal economy just to get by. Meera Senthilingam, CNN, 7 Mar. 2025 Not in a classroom with a lecture but sitting on your couch with your family, eating some popcorn, getting this informal education, and hopefully planting a seed that, hey, Black women do this type of science. Victoria Uwumarogie, Essence, 7 Mar. 2025 This multinational drill focuses on anti-submarine warfare tactics and involves maritime patrol and reconnaissance aircraft from the U.S., Australia, India and Japan—members of the U.S.-led informal grouping Quad—as well as South Korea, a Washington treaty ally. Russel Honoré, Newsweek, 6 Mar. 2025 Formal and informal mentorship relationships help foster a culture that values idea sharing and experimentation. Michael Horowitz, Forbes, 6 Mar. 2025 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 12 Mar. 2025.

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

More from Merriam-Webster on informal

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