Meaning of “instant” - Learner’s Dictionary

instant

adjective uk us /ˈɪnstənt/
IMMEDIATE

B2 happening immediately:

The book was an instant success in the US.
FOOD

Instant food or drink is dried, usually in the form of a powder, and can be made quickly by adding hot water:

instant coffee
→ See also instant replay

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