Definition of semi in English:

semi

Syllabification: sem·i
Pronunciation: /ˈsemī
 
/

noun (plural semis)

informal
1North American A tractor-trailer: she pulled into the path of a semi
More example sentences
  • Stephanie pressed hard on the accelerator and the car shot forward out of the trucks path, the semi missing them by less than a foot.
  • It looks suspiciously like a freezer, only very, very large; like the trailer of a semi.
  • Their semi pulls 30-foot grain trailers instead of normal 40-footers.
2A semifinal: they defeated them in the semi
More example sentences
  • With two quarter-finals and both semis still outstanding, tournament organisers must decide whether to stretch the final over to Monday or abandon the event, as they were forced to do in 1998.
  • Her game just kept improving with every round, she played some tough matches, demolished the defending champion in the semis and survived a battle of attrition in the final.
  • For somebody who has been back barely four months, her progress has been miraculous: she won the Washington Open and has reached the semis or quarters of five other tournaments.
3British A semidetached house: a three-bedroom semi
More example sentences
  • They also plan to buy a bigger house than their three-bedroom semi, although Mr Stone said he would not leave his job as an IT analyst in South Manchester.
  • York, he said, had many good properties from two- and three-bedroom town and terraced houses to semis and riverside apartments.
  • Parallel to the seafront, Castle Avenue is a quirky road of elegant Victorian red-brick houses, 1930s-built semis and modest bungalows.

Origin

early 20th century: abbreviation.

Definition of semi in:

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Pronunciation: ˈdɪs(ə)nənt
adjective
lacking harmony