n. The act of admitting or allowing to enter; the state of being admitted; entrance afforded by permission, by provision or existence of means, or by the removal of obstacles: as, the admission of aliens into a country; the admission of light into a room by a window or by opening the window.n. Admittance; power or permission to enter; entrance; access; power to approach: as, to grant a person admission.n. The price paid for entrance; admission fee: as, the admission was one dollar.n. Eccles.: In the Church of England, an act of a bishop accepting a candidate presented to a benefice.n. In the Presbyterian churches, especially in Scotland, a similar official act of a presbytery admitting a minister to his church.n. The act of expressing assent to an argument or proposition, especially one urged by an opponent or adversary; hence, a point or statement admitted; concession; allowance: as, this admission lost him the argument.n. Acknowledgment; confession of a charge, an error, or a crime: as, he made full admission of his guilt.n. In law: A voluntary acknowledgment that something is true.n. The act of receiving evidence offered upon a judicial investigation, as competent for consideration in reaching a decision.n. Specifically, in engineering: Entrance of motor fluid (as steam, air, or water) into a cylinder for the purpose of driving a piston.n. The portion of a full traverse of a piston during which the motor fluid is allowed to enter the cylinder.n. The point in the traverse at which such entrance of motor fluid begins.