1.
Begin an earnest attempt, as in He set out to prove his point, or We accomplished what we set out to do. [Late 1800s]
2.
Lay out systematically, as in She set out all the reports in chronological order. [Second half of 1500s]
3.
Display for exhibition or sale, as in The Japanese restaurant set out samples of all the different kinds of sushi. [c. 1300]
4.
Plant, as in It was time to set out the seedlings. [Early 1800s]
5.
Begin a journey, as in They set out at dawn. [Late 1500s]