The capacity to do work or cause physical change; energy, strength, or active power: the force of an explosion. Power made operative against resistance; exertion: use force in driving a nail. The use of physical power or violence to compel or restrain: a confession obtained by force. Intellectual power or vigor, especially as conveyed in writing or speech. Moral strength. A capacity for affecting the mind or behavior; efficacy: the force of logical argumentation. One that possesses such capacity: the forces of evil. A body of persons or other resources organized or available for a certain purpose: a large labor force. A person or group capable of influential action: a retired senator who is still a force in national politics. Military strength. The entire military strength, as of a nation. Often used in the plural. A unit of a nation's military personnel, especially one deployed into combat: Our forces have at last engaged the enemy. Law Legal validity. Physics A vector quantity that tends to produce an acceleration of a body in the direction of its application. Baseball A force play. To compel through pressure or necessity: I forced myself to practice daily. He was forced to take a second job. To gain by the use of force or coercion: force a confession. To move or effect against resistance or inertia: forced my foot into the shoe. To inflict or impose relentlessly: He forced his ideas upon the group. To put undue strain on: She forced her voice despite being hoarse. To increase or accelerate (a pace, for example) to the maximum. To produce with effort and against one's will: force a laugh in spite of pain. To use (language) with obvious lack of ease and naturalness. To move, open, or clear by force: forced our way through the crowd. To break down or open by force: force a lock.