Definition of onion noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈʌnjən//
; NAmE NAmE//ˈʌnjən//
[countable, uncountable] Vegetables
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a round vegetable with many layers inside each other and a brown, red or white skin. Onions have a strong smell and flavour. Chop the onions finely. French onion soup See related entries: Vegetables Word OriginMiddle English: from Old French oignon, based on Latin unio(n-), denoting a kind of onion.Extra examples Garnish with a little chopped onion. Put the chopped onion and garlic in the pan… a jar of pickled onions cheese and onion flavoured crisps sage and onion stuffing the onion domes of St Basil’s Cathedral
See the Oxford Advanced American Dictionary entry: onion