automatic

nouns

light machine gun
automatic, automatic rifle, machine rifle
a pistol that will keep firing until the ammunition is gone or the trigger is released
automatic, automatic pistol

adjectives

operating with minimal human intervention; independent of external control
"automatic transmission"; "a budget deficit that caused automatic spending cuts"
automatic
is derived from
automatize
is derived from
automaton
antonym
manual
is similar to
(of firearms) capable of automatic loading and firing continuously
"an autoloading rifle"
autoloading, self-loading, semiautomatic
is similar to
operated by automation
"an automated stoker"
automated, machine-controlled, machine-driven
is similar to
designed to activate or move or regulate itself
"a self-activating sprinkler system"
self-acting, self-activating, self-moving, self-regulating
is similar to
locking automatically when closed
self-locking
is similar to
designed so that manual winding is unnecessary
"a self-winding watch"
self-winding
is similar to
partially automatic
semiautomatic
is similar to
capable of independent and apparently intelligent action
"smart weapons"
smart
see also
using (or as if using) mechanisms or tools or devices
"a mechanical process"; "his smile was very mechanical"; "a mechanical toy"
mechanical
resembling the unthinking functioning of a machine
"an automatic `thank you'"; "machinelike efficiency"
automatic, automatonlike, machinelike, robotic, robotlike
is derived from
automatize
is derived from
automaton
without volition or conscious control
"the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive"
automatic, reflex, reflexive