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English definition of “plain”

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plain

adjective
 
 
/pleɪn/
SIMPLE B1 simple and not complicated: plain foodPlain and ordinaryTedious and uninspiring
NOT MIXED B1 not mixed with other colours, substances, etc: a plain blue carpet plain yoghurtPlain and ordinaryTedious and uninspiring
PERSON A plain person is not attractive to look at.Plain and ordinaryTedious and uninspiringNot attractive to look atSerious and unpleasant
OBVIOUS obvious and clear: [+ (that)] It's quite plain that she doesn't want to talk to me about it. →  See also be plain sailing Apparent and obviousVisible
(Definition of plain adjective from the Cambridge Learners Dictionary © Cambridge University Press)
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