Semi Definition
sĕmī, sĕmē
semis
noun
semis
A semitrailer and the tractor to which it is attached.
Webster's New World
A tractor-trailer.
American Heritage
A semifinal.
Wiktionary
A semiformal dance.
American Heritage
(UK, Australia, Canada) A semi-detached house.
Wiktionary
Synonyms:
prefix
Half.
Semicircle.
American Heritage
Partial; partially.
Semiconscious.
American Heritage
Resembling or having some of the characteristics of.
Semiofficial.
American Heritage
Occurring twice during.
Semimonthly.
American Heritage
Wiktionary
affix
Half.
Semicircle.
Webster's New World
Partly, not fully, imperfectly.
Semicivilized.
Webster's New World
Twice in a (specified period)
Semicentennial.
Webster's New World
Origin of Semi
-
Middle English from Latin sēmi- half sēmi- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
L < IE *semi- > Gr hēmi-, Sans sāmi-, OE sām-
From Webster's New World College Dictionary, 5th Edition
The prefix semi- (from Latin) used as a noun.
From Wiktionary
-
From Latin semi- (“half").
From Wiktionary
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