Definitions

1. pronoun

used as the object of a verb or preposition, referring to the speaker and others of the same group

“We will help ourselves to some food.”

2. reflexive pronoun

used to refer back to the subject of the sentence, emphasizing an action performed by the subject on itself

“She will decorate the room herself and then decorate it ourselves.”

3. noun

the speaker and others of the same group, considered as a unit

“What do we do with ourselves on a cold winter day?”