Pronunciation: /ɪnˈfɔːm(ə)l/
adjective
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1having a relaxed, friendly, or unofficial style, manner, or nature: an informal atmosphere an informal agreement between the two companies
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(of dress) casual; suitable for everyday wear: the guys wore very informal clothes
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2denoting the grammatical structures, vocabulary, and idiom suitable to everyday language and conversation rather than to official or formal contexts.
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3(of economic activity) carried on by self-employed or independent people on a small scale, especially unofficially or illegally: Peru’s huge and dense informal sector of street vendors and cottage industries
