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Related to semi-automatic: Semi-automatic transmission
sem·i·au·to·mat·icor sem·i-au·to·mat·ic (sĕm′ē-ô′tə-măt′ĭk, 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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.