Meaning of “leave sb/sth behind” - Learner’s Dictionary

leave sb/sth behind

phrasal verb with leave uk us /liːv/ verb (past tense and past participle left /left/)

A2 to leave a place without taking something or someone with you:

We were in a hurry and I think I must have left my keys behind.

(Definition of “leave sb/sth behind” from the Cambridge Learner’s Dictionary © Cambridge University Press)