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Important notice

Good news! We have updated our writing tools. Writing Tips and The Canadian Style have been combined to create a new tool called Writing Tips Plus.

Don’t forget to update your bookmarks. Within a few weeks, Writing Tips will no longer be available.

To begin your search, go to the alphabetical index below and click on the first letter of the word you are searching for.

act on, act upon

The verbs act on and act upon mean to take action, frequently as a result of advice or information received.

  • The provincial government shows no reluctance to act on municipal issues.
  • The detective acted on the information she received from the informer.
  • The federal government acted upon most of the recommendations it received from the parliamentary committee.
  • Those chemicals act upon the environment in a very harmful way.