adj
informal
ihn-FAW-ml
adj
1
Relaxed and casual rather than official or ceremonious.
"It was an informal gathering, just close friends and family."
"She prefers an informal tone when writing to colleagues."
How to Use Informal
Learner’s notesIn plain EnglishCasual rather than official or by-the-book.
Common pairings
informal setting
informal meeting
keep it informal
Word Forms
more informal comparative, most informal superlative
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It was an _____ gathering, just close friends and family.
Etymology
From in- ("not") plus formal.