Entry 3 senses · 3 variants Webster, 1913 Greave /grēv/ · IPA /ɡɹiːv/ n. n. v. t. 01 n. A grove. 1. A grove.[Obs.] 02 n. Armor for the leg below the knee; -- usually in the plural. 1. Armor for the leg below the knee; -- usually in the plural. 03 v. t. To clean (a ship's bottom); to grave. imp. & p. p. Greaved; p. pr. & vb. n. Greaving 1. To clean (a ship's bottom); to grave.(Naut.)