semiautomatic

adjective

semi·​au·​to·​mat·​ic ˌse-mē-ˌȯ-tə-ˈma-tik How to pronounce semiautomatic (audio)
ˌse-ˌmī-
-mi-
: 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.
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 Sheriff’s officials said investigators found four firearms, including a rifle and a semiautomatic handgun without serial numbers, two additional handguns and a 30-round rifle magazine loaded with armor-piercing ammunition. Rosalio Ahumada, Sacbee.com, 29 Oct. 2025 Snowling carried a revolver in his right hand and a semiautomatic handgun in his left. Tony Saavedra, Oc Register, 22 Oct. 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 14 Nov. 2025.

More from Merriam-Webster on semiautomatic

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!