very silly or unreasonablesynonymabsurd,ludicrousI look ridiculous in this hat.Don't be ridiculous! You can't pay £50 for a T-shirt!It was ridiculous that this should be so difficult to say.They ate and drank a ridiculous amount.Oxford Collocations Dictionaryverbsbe,feel,look,…adverbreally,absolutely,completely,…phrasesa sense of the ridiculousSeefull entryWord Originmid 16th cent.: from Latin ridiculosus, from ridiculus ‘laughable’, from ridere ‘to laugh’.Extra examplesThe whole idea was patently ridiculous.The whole situation appealed to her sense of the ridiculous.This is getting ridiculous!Don’t be so ridiculous!It’s ridiculous to suggest that she was involved in anything illegal.That’s the most ridiculous thing I’ve ever heard.You look ridiculous in that hat!
See ridiculous in the Oxford Learner's Dictionary of Academic EnglishSee ridiculous in the Oxford Advanced American Dictionary