sem·i·au·to·mat·ic or sem·i-au·to·mat·ic (sĕm′ē-ô′tə-mătĭk, sĕm′ī-)
1. Partially automatic.
2. Ejecting a shell and loading the next round of ammunition automatically, but requiring a squeeze of the trigger for each shot. Used of a firearm.
A semiautomatic firearm.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
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