ETYM Old Eng. hacche, AS. haec, cf. haca the bar of a door, Dutch hek gate, Swed. häck coop, rack, Dan. hekke manger, rack. Prob. akin to Eng. hook, and first used of something made of pieces fastened together. Related to Heck, Hack a frame.
1. A covering for a hatchway.
2. Shading consisting of multiple crossing lines; SYN. hatching, crosshatch, hachure.
3. The production of young from an egg; SYN. hatching.