seminoun/ˈsɛmi/

• 1

  informalA semi-detached house.

  • 2008, Elliott Placks, quoted in Helen Isbister, Morris Bryant, Property, Career FAQs, Australia, page 40, I′m selling two side-by-side semis that are currently under construction, a waterfront apartment and a house in Rose Bay.
  • The smaller semis of the 1920s and 1930s were closely related to the three bedroom pre-1919 narrow fronted terraces, at least to the larger pre-1919 terraces.
• 2

  A semi-trailer; a tractor-trailer; an eighteen-wheeler; an artic.

  • I was hungry an' freezin' an' done caught a chill / When the lights of a big semi topped the hill
  • All night we couldn′t hear each other speak because of the sound of semis changing gear to get over the hill.
• 3

  informalA semifinal.

• 4

  slangA partial erection of the penis.

  • The twink got a semi just from that look.
• 5

  slangA semiautomatic firearm.

  • See these niggas through the reticle sight up on my semi […] For niggas plottin', I might blow it at your fitted Get your bitch-ass slimed out, it ain't no kiddin' Ain't no kiddin', got that semi
• 6

  slangbusinessfinanceSemiconductor companies or positions in the stock market.

• 7

  businessminingAn intermediate in the production of end-use goods.

  • Mining companies crush and grind the extracted ore, and then use flotation processes to produce copper concentrates, which typically contain up to 30 percent copper. These concentrates are then smelted to produce copper blister, which has a purity of up to 99 percent. The blister is further refined to produce copper cathode, or pure copper, with a grade of around 99.99 percent. This process is known as pyrometallurgy, and is suitable for sulfide ores as opposed to oxide ores. The pure copper then feeds into the fabrication of various copper products, such as wire rods, wires, bars, and sheets—collectively known as semis—used as inputs in the manufacturing of end-use products, including consumer goods and construction, transportation (e.g., EVs) and infrastructure components.

semiadv/ˈsɛmi/

• 1

  informalSomewhat; to some extent.

  • 'Is that a serious question?' he asked. Ralph shrugged with his face, jutting out his bottom lip. 'Well ... semi,' he said.