Ch'in (Noun) — The Chinese dynasty (from 246 BC to 206 BC) that established the first centralized imperial government and built much of the Great Wall.
Ch'in (Noun) — The protruding part of the lower jaw.
Ch'in (Noun) — Kamarupan languages spoken in western Burma and Bangladesh and easternmost India.
Ch'in (Verb) — (gymnastics) raise oneself while hanging from one's hands until one's chin is level with the support bar.