automatic
au-to-mat-ic
adjective
Certain to happen as a natural, unavoidable consequence.
"Promotion is automatic after five years."
noun
A vehicle with an automatic transmission system.
"She prefers driving an automatic."
adjective
Done without conscious thought; instinctive or involuntary.
"It was an automatic reaction."
noun
A firearm, especially a pistol, that reloads automatically.
"He drew his automatic quickly."
adjective
Operating independently without direct human intervention or control.
"The automatic doors opened smoothly."
Thesaurus
Synonyms: automatic pistol, self-regulating, machine-driven, machine-controlled, self-moving, self-loading, automated, smart, self-acting, semiautomatic, self-locking, self-activating
Antonyms: manual