act on/upon

phrasal verb
acted on/upon; acting on/upon; acts on/upon

Definition of act on/upon

: to use (something, such as a feeling or suggestion) as a reason or basis for doing something They never acted on the information they had. It's okay to feel angry or jealous, but you mustn't act on those feelings.

Comments on act on/upon

What made you want to look up act on/upon? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

formidable, illustrious, or eminent

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!