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

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

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

semi-skilled used to describe something that happens twice within a particular time: a semi-weekly appointment (Definition of semi from the Cambridge Business English Dictionary © Cambridge …

16 hours ago · Carson Beck scrambled for a 3-yard touchdown with 18 seconds left, and Miami will head back home for a shot at its first national championship since 2001 after beating Ole Miss 31-27 in an ...

Despite what you may think, the "semi" in “semi-truck” actually refers to the trailer, not the truck itself. In fact, the name “semi-truck” is just a shortened version of “semi-trailer truck.”

semi- 1. A prefix that means "half," as in semicircle, half a circle. 2. A prefix that means "partly," "somewhat," or "less than fully," as in semiconscious, partly conscious.

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.

Definition of semi noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.