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English definition of “sour”

sour

adjective (TASTE)    /saʊər/ US  /saʊr/
B1 having a sharp, sometimes unpleasant, taste or smell, like a lemon, and not sweet: These plums are a bit sour.Flavours and tastesSmells and smellingNot pleasant to eat or drink sourness     /ˈsaʊə.nəs/ US  /ˈsaʊr-/ noun [U] Flavours and tastesNot being friendlyNot saying muchBlunt and direct in speech and behaviourBad-temperedNot pleasant to eat or drink
(Definition of sour adjective (TASTE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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