n. 1 opening in a wall between a kitchen and diningroom for serving food. 2 opening or door in an aircraft etc. 3 a = HATCHWAY. b cover for this. [Old English]. v. 1 a (often foll. by out) (of a young bird or fish etc.) emerge from the egg. b (of an egg) produce a young animal. 2 incubate (an egg). 3 (also foll. by up) devise (a plot etc.). n. 1 act of hatching. 2 brood hatched. [earlier hacche, from Germanic]. v. mark with close parallel lines.