1. Notched on the edge, like a saw.
2. (Science: botany) Beset with teeth pointing forwards or upwards; as, serrate leaves. Doubly serrate, having small serratures upon the large ones, as the leaves of the elm. Serrate-ciliate, having fine hairs, like the eyelashes, on the serratures; said of a leaf. Serrate-dentate, having the serratures toothed.
Origin: L. Serratus, fr. Serra a saw; perhaps akin to secare to cut, E. Saw a cutting instrument. Cf. Sierra.