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

red

noun

red

red

1 [countable, uncountable] the colour of blood or fireShe often wears red.the reds and browns of the woods in the fall (= of the leaves)I've marked the corrections in red (= in red ink).The traffic lights were on red.2 [uncountable, countable] red wineWould you prefer red or white?an Italian red3 [countable] (informal, disapproving, politics) a person with very left-wing political opinions compare pinko

Idioms

be in the red

(informal) to owe money to your bank because you have spent more than you have in your accountThe company has plunged $37 million into the red.My account is $100 in the red. compare be in the black

see red

(informal) to become very angryPeople who drop litter make me see red.