set on

set on idiom
    Also, set upon.
  1. Attack; see set at.
  2. Instigate, urge one to engage in action, as in The older boys set on the young ones to get in trouble. [Early 1500s]
  3. be set on or upon. Be determined to, as in He's set on studying law.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.