Cōs'tard, n.

n. [A modification of custard, custard-apple, q. v.] 1. A large apple. Apples be so divers of form and substance that it were infinite to describe them all; some consist more of air than water . . . ; others of water more than wind, as your costards and pomewaters. Muffett. 2. The head; — used contemptuously. I'll try whether your costard or my bat be the harder. Shak.