Meaning of “rear” - Learner’s Dictionary

rear

verb uk us /rɪər/
CARE FOR YOUNG [ T ]

If you rear children or young animals, you care for them until they are adults:

In these waters they breed and rear their young.
HORSE [ I ] ( also rear up)

If a horse rears, it stands on its back legs.

→ See also raise/rear its ugly head

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