Question

what is Reserve define​

Answer 1

Answer:

Reserve

to keep something for a particular purpose or time:

I reserve Mondays for tidying my desk and answering letters.

These seats are reserved for the elderly and women with babies.

I reserve judgment on this issue (= I won't give an opinion on it now) until we have more information

Answer 2

Answer:

$what \: is \: reserve$

=>retain for future use.