1
general::
Phrase(s): *in force
1. [of a rule or law] currently valid or in effect. (*Typically: be ~.) • Is this rule in force now? • The constitution is still in force. 2. Fig. in a very large group. (*Typically: arrive ~; attack ~.) • The entire group arrived in force. • The mosquitoes will attack in force this evening.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
1. In full strength, in large numbers, as in Demonstrators were out in force. This usage originally alluded to a large military force. [Early 1300s] 2. Operative, binding, as in This rule is no longer in force. This usage originally alluded to the binding power of a law. [Late 1400s]
American Heritage Idioms