n. The act of incising or cutting into a substance; specifically, the act of cutting into flesh, as for the purpose of bloodletting.n. A division or passage made by cutting; a cut or cutting; a gash.n. Figuratively, trenchancy; incisiveness.n. In botany and entomology, a slit or deep notch resembling a cut.n. In Doric arch., same as hypotrachelium.n. A cutting away; removal, as by an acid or a drug.