Entry 2 senses · 2 variants Webster, 1913 Ratch /(răch)/ · IPA n. n. 01 n. Same as Rotche. 1. Same as Rotche.(Zool.) See: Rotche 02 n. A ratchet wheel, or notched bar, with which a pawl or click works. 1. A ratchet wheel, or notched bar, with which a pawl or click works.