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semiautomatic

adjective

semi·​au·​to·​mat·​ic ˌse-mē-ˌȯ-tə-ˈma-tik How to pronounce semiautomatic (audio)
ˌse-ˌmī-
-mi-
Synonyms of semiautomaticnext
: not fully automatic: such as
a
: operated partly automatically and partly by hand
b
of a firearm : able to fire repeatedly through an automatic reloading process but requiring release and another pressure of the trigger for each successive shot
a semiautomatic rifle
semiautomatic noun
semiautomatically adverb

Examples of semiautomatic in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
An Australian man, who had amassed a cache of semiautomatic weapons legally, shot dead 51 Muslim worshipers during Friday prayers. Charlottegraham-McLay The Associated Press, Arkansas Online, 26 Nov. 2025 Lanez, whose real name is Daystar Peterson, was convicted of assault with a semiautomatic firearm and sentenced to 10 years in prison. Nancy Dillon, Rolling Stone, 20 Nov. 2025 Binary triggers allow a semiautomatic weapon to fire both when the trigger is pulled and released, increasing its rate of fire. Mara H. Gottfried, Twin Cities, 6 Nov. 2025 In his interview with deputies, the victim's then-14-year-old son told investigators that his father had been beating his mother for two days using a shoe, a belt, a semiautomatic weapon and even a flag pole, per the probable cause affidavit. Chris Spargo, PEOPLE, 1 Nov. 2025 See All Example Sentences for semiautomatic

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of semiautomatic was in 1853

Browse Nearby Words

Cite this Entry

“Semiautomatic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semiautomatic. Accessed 5 Dec. 2025.

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