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semiautomatic

semiautomatic

23 5.5
A machine that does some tasks by itself but needs human action for others
  • adjective
  • /ˌsɛmiˈɔːtəˌmætɪk/
translation icon : semiautomático
  • Detectives said the man pulled a small-framed semiautomatic rifle from his backpack and walked up to a teller.
  • semiautomatic firearm
  • semiautomatic rifle
  • semiautomatic weapons

Examples

  • "You bought a .380 semiautomatic pistol, Lucy."

    Fiction book (1994)
  • Two hundred semiautomatic rifles were stacked against the walls.

    Fiction book (1994)
  • Hundreds of students were inside the library when the man, Myron May, began shooting outside the building with a semiautomatic handgun.

    Academic text (2016)
  • An M1 Garand rifle is a semiautomatic weapon, with eight bullets in a clip.

    Fiction book (1997)
  • The workstation is an automatic or semiautomatic computer that enters customer-order data into CAD drawings.

    Academic text (2011)
  • The factory uses a semiautomatic assembly line that speeds up production while still requiring workers to oversee certain tasks.

  • He prefers shooting with a semiautomatic rifle because it allows for quick follow-up shots but still needs him to pull the trigger for each round.

  • During the demonstration, the instructor showed how to operate the semiautomatic device efficiently while emphasizing the manual controls.

Antonyms

195 3.4

Works by itself with little or no human control

101 3.8

Done by hand rather than by a machine

Compounds

semiautomatic pistol
  • Specialized
3 4.7

A small gun that reloads itself after each shot and fires one bullet each time you pull the trigger

semiautomatic firearm
  • Specialized
1 7.2

A gun that reloads itself after each shot but fires once per trigger pull

How Automatic

automatic
195 3.4
semiautomatic
23 5.5
manual
101 3.8

Surface Forms

semiautomatic positive

Morphology

semiautomatic = automatic (transparent) = semi + automatic

The meaning is directly compositional: 'semi-' means partly and 'automatic' supplies the core sense.

Etymology

Semiautomatic comes from the parts semi- meaning 'half' or 'partly' and automatic meaning 'works by itself'. As an adjective, semiautomatic describes a machine that does some jobs on its own but needs a person to do others, which is why a semiautomatic washing machine may wash automatically but must be filled and emptied by hand.