forceforceforces1noun1(no plural) power or strength: He was killed by the force of the explosion. I lost the key so I had to open the door by force.2(pluralforces) a group of people, for example police or soldiers, who do a special job: the police forceforceforceforcesforcedforcing2verb (forces, forcing, forced)1to make somebody do something that they do not want to do: They forced him to give them the money.2to do something by using a lot of strength: The thief forced the window open.