n. The state of being serrate; a serrated condition; formation in the shape of the edge of a saw.n. In zoöl., anat., and botany:n. A serra; a formation like a saw in respect of its teeth; a set or series of saw-like teeth. See cuts under Priacanthus and serratirostral.n. One of a set of serrate or dentate processes: as, one of the nine serrations of the serratus magnus muscle.