semiautomatic

UK: /ˌsɛmiˌɔːtəˈmætɪk/ US: (sem′ē ô′tə mat′ik, sem′ī-)

WordReference Random House Unabridged Dictionary of American English © 2025

sem•i•au•to•mat•ic  (sem′ē ô′tə mat′ik, sem′ī-), adj. 

1. partly automatic.
2. Military (of a firearm) automatically ejecting the cartridge case of a fired shot and loading the next cartridge from the magazine but requiring a squeeze of the trigger to fire each individual shot.

n. 

3. Military a self-loading rifle or other firearm.

• semi- + automatic 1890–95

sem′i•au′to•mat′i•cal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

semiautomatic / ˌsɛmɪˌɔːtəˈmætɪk/ adjective

1. partly automatic
2. (of a firearm) self-loading but firing only one shot at each pull of the trigger
   Compare automatic5

noun

1. a semiautomatic firearm

ˌsemiˌautoˈmatically adverb