Semi
Semi- is a numerical prefix meaning "half". The prefix alone is often used as an abbreviation when the rest of the word (the thing which half of is being described) is clear from context. 
Semi or SEMI may refer to:

Semiconductor Equipment and Materials International (SEMI)
Semiconductor industry, also known as semi or semis in financial news
Semi-automatic firearm
Semi-detached house, a type of housing
Semi-erection, a partial erection when the penis is enlarged but not fully erect
Semi-final, of a knockout competition
Semi-formal, (esp. high school) dance
Semi Ojeleye (born 1994), American basketball player
Semiquaver, the time interval in music, which is half the length of a quaver
Semi-submersible, a watercraft which operates mostly submerged
Semi-trailer truck (UK: articulated lorry), a truck design of a tractor vehicle pulling semi-trailers
Semi-trailer, a trailer with wheels at the rear end only
Tractor unit (semi truck engine), the motortruck engine drive unit vehicle that pulls the trailers
Tesla Semi, vehicle by Tesla, Inc. ; an electric vehicle based tractor unit that pulls trailers
Road train, an extreme version of the semi truck train of trailers
Goo Semi, member of South Korean girlgroup Cignature
Semi Kunatani (born 1990), Fiji rugby union player for the Tel Aviv Heat

See also

All pages with titles beginning with Semi
All pages with titles containing Semi
Demi (disambiguation)
Hemi (disambiguation)
Half (disambiguation)