Semi meaning

sĕm'ī, sĕm'ē
A semiformal dance.
noun
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2
Half.

Semicircle.

prefix
8
2
Half.

Semicircle.

affix
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2
Occurring twice during.

Semimonthly.

prefix
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0
A semifinal.
noun
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1
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A semitrailer and the tractor to which it is attached.
noun
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0
Partly, not fully, imperfectly.

Semicivilized.

affix
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Twice in a (specified period)

Semicentennial.

affix
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0
A prefix that means “half,” (as in semicircle, half a circle) or “partly, somewhat, less than fully,” (as in semiconscious, partly conscious).
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0
(UK, Australia, Canada) A semi-detached house.
noun
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noun
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(slang) A partial erection.
noun
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0
anagrams
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prefix
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prefix
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Somewhat, rather, quasi-
prefix
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Partial; partially.

Semiconscious.

prefix
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1
Resembling or having some of the characteristics of.

Semiofficial.

prefix
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1

Origin of semi

  • L < IE *semi- > Gr hēmi-, Sans sāmi-, OE sām-
    From Webster's New World College Dictionary, 5th Edition
  • Middle English from Latin sēmi- half sēmi- in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • The prefix semi- (from Latin) used as a noun.
    From Wiktionary
  • From Latin semi- (“half").
    From Wiktionary