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The meaning of SEMI is semifinal —often used in plural. How to use semi in a sentence.

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- definition: a combining form borrowed from Latin, meaning “half,” freely prefixed to English words of any origin, now sometimes with the senses “partially,” “incompletely,” “somewhat”. See examples …

Dec 29, 2025 · Adverb [edit] semi (not comparable) (informal) Somewhat; to some extent. quotations

1 day ago · Tesla has revealed some major information about the all-electric Semi as it heads toward “mass production,” according to CEO Elon Musk. The Semi has been working toward a wider …

7 hours ago · The Semi was a key tool in Tesla's quest to decarbonize global transportation, providing a zero-emissions option in the most polluting segment: the trucking industry.

A semi is a large truck that is made in two separate sections, a tractor and a trailer, which are joined together by metal bars.

semi- a combining form meaning “half” (semiannual), “partially,” “somewhat” (semiautomatic; semidetached; semiformal).

SEMI Is the global industry association representing the electronics manufacturing supply chain, connecting over 2,000 member companies and 1.3 million professionals worldwide.