Any semi-automatic weapon; semi-shots, smg's, etc. (pronounced seh-MEE) 2 -(n.) An 18-wheeler truck (pronounced seh-MI) 1 - Semi's are only half as fun as automatics. 2 - Aparrently a semi loaded with cocaine and doritos rolled over on the freeway yesterday. #truck #18 wheeler #gat #gun #strap #automatic
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3. National Science Foundation (NSF) (http://www.nsf.gov/) The NSF definition of STEM fields includes mathematics, natural sciences, engineering, computer and information sciences, and the social and behavioral sciences â psychology, economics, sociology, and political science.