in force(redirected from arrive 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.
in effect and in use The law has been in force for two years.
Usage notes: used when referring to laws, rules, agreements, and systems
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 Operative, binding, as in This rule is no longer in force.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]
1. In full strength; in large numbers: Demonstrators were out in force.
2. In effect; operative: a rule that is no longer in force.