Meaning of “rich” - Learner’s Dictionary

rich

adjective uk us /rɪtʃ/
MONEY

A2 having much more money than most people, or owning things that could be sold for a lot of money:

She's the third richest woman in Britain.
These cars are only for the rich.
CONTAINING A LOT

B2 containing a lot of something that is important or valuable:

rich soil
Both foods are rich in Vitamin C.
FOOD

B2 Rich food has a lot of butter, cream, or eggs in it:

a rich sauce
STRONG

A rich sound is low and strong, and a rich colour is bright and strong.

richness noun [ U ]

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