If you describe someone as passive, you mean that they do not take action but instead let things happen to them.

A passive activity involves watching, looking at, or listening to things rather than doing things.

Passive resistance involves showing opposition to the people in power in your country by not co-operating with them and protesting in non-violent ways.

In grammar, the passive or the passive voice is formed using 'be' and the past participle of a verb. The subject of a passive clause does not perform the action expressed by the verb but is affected by it. For example, in 'He's been murdered', the verb is in the passive.