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 …

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

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

Dec 29, 2025 · semi (plural semis) (UK, Ireland, Australia, Canada, informal) A semi-detached house. quotations 2008, Elliott Placks, quoted in Helen Isbister, Morris Bryant, Property, Career FAQs, …

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

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.

SEMI represents the electronics manufacturing and design supply chain, connecting over 2,600 member companies and 1.3 million professionals worldwide.

semi-, Pronouns a combining form borrowed from Latin, meaning "half,'' freely prefixed to English words of any origin, now sometimes with the senses "partially,'' "incompletely,'' "somewhat'': semiautomatic; …