intransitive verb
1. : to go away from a place usually for a short distance and for a short time
just stepped out for a while — Erskine Caldwell
2. : to go or march at a vigorous or increased pace
3. : die
4. : to engage in social activities : lead an active social life
has really been stepping out this past year
5. : to be unfaithful — usually used with on
hadn't been married two months before I knew he was stepping out on me — James Jones