act on/upon

phrasal verb

acted on/upon; acting on/upon; acts 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.

Examples of act on/upon in a Sentence

Recent Examples on the Web

Executives can often spot potential, but the challenge is knowing when to act on an innovation. —Expert Panel®, Forbes.com, 1 July 2025

But Democrats couldn’t act on those questions, and the administration could. —David Weigel, semafor.com, 30 June 2025

More human studies are necessary to confirm these effects.5 Another interesting area of research is the role of postbiotics in immune modulation.6 Unlike live probiotics, which need to survive in the gut to be effective, postbiotics can act on immune cells directly. —Patricia Weiser, Verywell Health, 30 June 2025

The budget also doesn’t act on Newsom’s proposal to streamline a project to create a massive underground tunnel to reroute a big part of the state’s water supply. —Trân Nguyễn, Los Angeles Times, 28 June 2025