Question

what is the meaning of passive voice

Answer 1

a form or set of forms of a verb in which the subject undergoes the action of the verb (e.g. they were killed as opposed to the active form he killed them ).

Answer 2

a form or set of forms of a verb in which the subject undergoes the action of the verb (e.g. they were killed as opposed to the active form he killed them ).
"the second sentence is in the passive voice"