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.
In the photo, the Temple Israel synagogue attacker, Ayman Mohamad Ghazali, is wearing all black with a black and white scarf and is holding what appears to be a semiautomatic rifle with a scope attached. Camilo Montoya-Galvez, CBS News, 19 Mar. 2026 Earlier that year, BSO seized Nathan’s 12 firearms, including semiautomatic shotguns, rifles and handguns, six suppressors and 660 rounds of ammunition. Grethel Aguila, Miami Herald, 13 Mar. 2026 Ivanna Ortiz, 35, was also charged with 10 counts of assault with a semiautomatic firearm and three felony counts of shooting at an inhabited dwelling or camper, according to the Los Angeles County District Attorney's Office. Dennis Romero, NBC news, 11 Mar. 2026 During the arrests, officers recovered an AR-style firearm and an unserialized black semiautomatic handgun believed to have been used in the shooting. Sydney Barragan, Oc Register, 4 Mar. 2026 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

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Cite this Entry

“Semiautomatic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semiautomatic. Accessed 27 Mar. 2026.

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