Meaning of “passive” - Learner’s Dictionary

passive

adjective uk us /ˈpæsɪv/
BEHAVIOUR

B2 letting things happen to you and not taking action:

Women at that time were expected to be passive.
GRAMMAR

B1 A passive verb or sentence is one in which the subject does not do or cause the action but is affected by it. For example 'He was released from prison.' is a passive sentence.

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