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.
In moving to prevent the sale of such devices, the Biden administration cited the frequency at which AR-15-style semiautomatic firearms have been used in mass shootings nationwide. Nate Raymond, USA Today, 18 May 2025 The law was amended again in 2019 to further restrict the sale of semiautomatic rifles to people under 21, also with some exceptions. Christian Martinez, San Diego Union-Tribune, 28 Mar. 2025 Nowhere is that more evident than at the 240,000-square-foot factory in central Italy of Benelli Armi, a Beretta subsidiary that makes semiautomatic shotguns. Giacomo Tognini, Forbes, 25 Mar. 2025 Three sixth-grade students were detained this week after one of them was found to have a semiautomatic handgun and ammunition in his or her backpack at Vista View Middle School in Fountain Valley, authorities said. Nathaniel Percy, Oc Register, 14 May 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 4 Jun. 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!