Meaning of “red” - Learner’s Dictionary

red

adjective uk us /red/ (redder, reddest)
COLOUR

A1 being the same colour as blood:

a red shirt
HAIR

A2 Red hair is an orange-brown colour:

Rosie's got red hair and freckles.
go red UK (US turn red)

B2 If someone goes red, their face becomes red because they are embarrassed or angry:

He kissed her on the cheek and she went bright red.
WINE

A2 Red wine is made from black grapes (= small, round, purple fruits).

→ See also be like a red rag to a bull

(Definition of “red adjective” from the Cambridge Learner’s Dictionary © Cambridge University Press)