(of a machine, device, etc. 机器、装置等 having controls that work without needing a person to operate them 自动的 automatic doors 自动门 a fully automatic driverless train 全自动无人驾驶列车 automatic transmission (= in a car, etc.) （汽车等内的）自动变速器 an automatic rifle (= one that continues to fire as long as the trigger is pressed) 自动步枪 My camera has manual and automatic functions. 我的照相机有手调和自动两种功能。
Oxford Collocations Dictionaryverbs- be
- completely
- fully
done or happening without thinking 无意识的；不假思索的 always happening as a result of a particular action or situation 必然的；当然的 A fine for this offence is automatic. 这种违法行为当然要罚款。 Promotion was almost automatic after two or three years. 两三年后几乎是自动获得晋升。
Oxford Collocations Dictionaryverbs- be
- almost
- virtually
Word Originmid 18th cent.: from Greek automatos ‘acting of itself’, from autos ‘self’. + -ic.