Stupid, dull, dense, crass, dumb mean lacking in power to absorb ideas or impressions. Stupid implies a slow-witted or dazed state of mind that may be either congenital or temporary. See examples of stupid used in a sentence.
If you say that someone or something is stupid, you mean that they show a lack of good judgment or intelligence and they are not at all sensible. I'll never do anything so stupid again. Feb 10, 2026adjective stupid (comparative stupider or more stupid, superlative stupidest or most stupid) without intelligence.
Stupid is an adjective used to describe someone or something that lacks intelligence, common sense, or is considered foolish or irrational.
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