semi

Multiple Entries:
  semi    semi-  

Concise Oxford English Dictionary © 2008 Oxford University Press:
semi/ˈsemi/
noun (pl. semis) informal
  • 1 Brit. a semi-detached house.
  • 2 a semi-final.
  • 3 N. Amer. a semi-trailer.

Concise Oxford English Dictionary © 2008 Oxford University Press:
semi-/ˈsemi/
prefix
  • 1 half: semicircular.

    ■ occurring or appearing twice in a specified period: semi-annual.

  • 2 partly: semi-conscious.

    ■ almost: semi-darkness.

– origin from L.; rel. to Gk hemi-.
'semi' also found in these Oxford entries:

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