join forces

Act together, combine efforts. For example, The public relations people joined forces to get better coverage for their candidates. This expression originally referred to combining military forces. [Mid-1500s]

Words Nearby join forces

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use join forces in a sentence

  • He had been scouring the country on his own account, and he was willing enough to join forces with Mark Twain.

  • If the maid had gone off first, I had to consider whether they would not again join forces as soon as I was well out of the way.

    The Passenger from Calais | Arthur Griffiths
  • We would join forces in genteel fashion, and have ourselves straightened out some day before the mayor.

    Germinie Lacerteux | Edmond and Jules de Goncourt
  • Here they easily persuaded the Messenians to join forces with them and declare war against the Spartans.

    The Story of the Greeks | H. A. Guerber
  • Here they hoped to join forces with Montgomery, who had already captured Montreal, and then come back to renew the siege.