greave /ɡɹiːv/noun 4verb 1forms 3 noun4 •(historical) A piece of armour that protects the leg, especially the shin, and occasionally the tops of the feet.And through the stained windows bright, / From o'er the red-tiled eaves, / The sunlight blazed with colored light / On golden helms and greaves. — 1883 •(no longer used) A bush; a tree; a grove.she fled into that covert greave — 1596 •(no longer used) A bough; a branch. •(no longer used) A ditch or trench. verb1 •To clean (a ship's bottom); to grave. formsgreaved · greaving · greaves