SEMIの定義と意味 - メリアム・ウェブスター

SEMI Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition noun (1) noun (2) noun (3) prefix noun 4 noun (1) noun (2) noun (3) prefix Example Sentences Word History Phrases Containing Rhymes Entries Near Cite this Entry Citation Kids Definition Kids More from M-W Show more Show more Citation Kids More from M-W Save Word To save this word, you'll need to log in. Log In semi 1 of 4 noun (1) ˈse-ˌmī also -mē plural semis Synonyms of semi : semifinal — often used in plural semi 2 of 4 noun (2) ˈse-ˌmī also -mē plural semis : semitrailer semi 3 of 4 noun (3) ˈse-mē also -ˌmī plural semis chiefly British : a semidetached house semi- 4 of 4 prefix ˌse-mē , -ˌmī , -mi 1 a : precisely half of: (1) : forming a bisection of semi circle (2) : being a usually vertically bisected form of (a specified architectural feature) semi dome b : half in quantity or value : half of or occurring halfway through a specified period of time semi annual semi monthly compare bi- 2 : to some extent : partly : incompletely semi- independent semi dry compare demi- , hemi- 3 a : partial : incomplete semi consciousness semi darkness b : having some of the characteristics of semi porcelain c : quasi- semi governmental semi monastic Examples of semi in a Sentence Recent Examples on the Web Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback . Noun The board held first-round interviews with the firm’s recommended semi -finalists in late March, and finalists were announced on March 26. — Frederick Melo, Twin Cities , 30 Apr. 2026 Congestion also has consequences for semi -trucks loaded with freight. — Charles Selle, Chicago Tribune , 29 Apr. 2026 Meanwhile, there could be some intermittent shutdowns because part of the semi ’s trailer was pushed half a mile down the tracks. — Kansas City Star , 28 Apr. 2026 The truck was located in Port Wentworth, Georgia, but Gonzalez was not with the semi , the FBI said. — David Goodhue, Miami Herald , 28 Apr. 2026 See All Example Sentences for semi Word History Etymology Noun (3) short for semidetached Prefix Middle English, from Latin; akin to Old High German sāmi- half, Greek hēmi- First Known Use Noun (1) 1942, in the meaning defined above Noun (2) 1942, in the meaning defined above Noun (3) 1912, in the meaning defined above Time Traveler The first known use of semi was in 1912 See more words from the same year Phrases Containing semi semi - antique semi - autobiographical semi - autobiography semi - erect semi - independent semi - private semi - skimmed milk Rhymes for semi emmy jemmy remi See All Rhymes for semi Browse Nearby Words Semey semi semi- See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Semi.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/semi. Accessed 5 May. 2026. Copy Citation Kids Definition semi- prefix ˌsem-i , ˈsem- , -ˌī 1 : half in amount or value semi tone 2 : occurring halfway through a certain time period semi annual 3 : to some extent : partly : incompletely semi tropical 4 : partial : incomplete semi darkness Etymology Prefix Latin semi- "half" More from Merriam-Webster on semi Thesaurus: All synonyms and antonyms for semi Nglish: Translation of semi for Spanish Speakers Last Updated: 1 May 2026 - Updated example sentences Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged More from Merriam-Webster Word of the Day augur See Definitions and Examples » Get Word of the Day daily email! Popular in Grammar & Usage See More More Commonly Mispronounced Words 5 Verbal Slip Ups and Language Mistakes Is it 'used to' or 'use to'? The Difference Between 'i.e.' and 'e.g.' Why is '-ed' sometimes pronounced at the end of a word? See More Popular in Wordplay See More The Longest Long Words List 9 Other Words for Beautiful The Words of the Week - May 1 Was 'nervous Nellie' a Real Person? 12 Lovely and Unusual Words for the Natural World See More Popular See More More Commonly Mispronounced Words The Longest Long Words List 9 Other Words for Beautiful See More Games & Quizzes See All Quordle Can you solve 4 words at once? Play Blossom Pick the best words! Play The Missing Letter A daily crossword with a twist Play Name That Tree! A quiz that’s all bark, no bite. Take the quiz See All