adj. & n.
adj. 1 (of a machine, device, etc., or its function) working by itself, without direct human intervention. 2 a done spontaneously, without conscious thought or intention (an automatic reaction). b necessary and inevitable (an automatic penalty). 3 Psychol. performed unconsciously or subconsciously. 4 (of a firearm) that continues firing until the ammunition is exhausted or the pressure on the trigger is released. 5 (of a motor vehicle or its transmission) using gears that change automatically according to speed and acceleration.
n. 1 an automatic device, esp. a gun or transmission. 2 colloq. a vehicle with automatic transmission. automatic pilot a device for keeping an aircraft on a set course. automatically adv. automaticity n.
[ formed as AUTOMATON + -IC ]