sour

/saʊr/
noun
  1. A sour taste or thing, especially a sour candy or drink.
    • She handed me a bag of sours, and I picked out the green ones.
    • I prefer sweets over sours, but I'll eat both.
    • The cocktail was a mix of sweet and sour.
adjective
  1. Having a sharp, acidic taste like lemon or vinegar.
    • The green apple was so sour it made my mouth pucker.
    • I love sour candy, but my sister prefers sweet chocolate.
    • The lemonade was too sour, so I added some sugar.
  2. Unpleasant, unfriendly, or bad-tempered in mood or expression.
    • The meeting ended on a sour note when they couldn't agree.
    • Her sour attitude made everyone in the room uncomfortable.
    • After losing the game, he had a sour look on his face.
  3. Spoiled or fermented, especially of milk or other food.
    • The milk smelled sour, so I poured it down the drain.
    • The sour cream in the fridge was still fresh enough to use.
    • If you leave bread in a damp place, it can turn sour.
Synonyms
verb
  1. To become or make something sour in taste.
    • The hot weather caused the milk to sour quickly.
    • The fruit soured after being left in the sun too long.
    • If you add lemon juice, it will sour the sauce.
  2. To make or become unpleasant, bitter, or less friendly.
    • The constant criticism soured her enthusiasm for the project.
    • The argument soured their friendship for years.
    • His bad experience soured him on traveling alone.