- To initiate or begin some action.
- He set about designing his homepage.
- 22 March 2012, Scott Tobias, AV Club The Hunger Games
- But that’s a dubious triumph: A book is a book and a movie is a movie, and whenever the latter merely sets about illustrating the former, it’s a failure of adaptation, to say nothing of imagination.
- To attack.
- Two youths set about him.
to initiate or begin some action