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

Semi - is a combining form used like a prefix meaning “half.” In some instances, it is used figuratively to mean "partially," "incompletely," or "somewhat."

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

semi noun [C] (VEHICLE) US (UK articulated lorry) a large truck for carrying goods, consisting of a strong front part that pulls a large box-like container behind it

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.

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

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SEMI meaning: 1 : semifinal usually plural; 2 : a short, heavy truck that has a long trailer attached to the back and that is used to move goods semitrailer