Definition of simian in English:

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Pronunciation: /ˈsɪmɪən/


1Relating to or affecting apes or monkeys: simian immunodeficiency virus Compare with prosimian.
More example sentences
  • Researchers have identified simian immunodeficiency virus in wild apes for the first time.
  • The simian immunodeficiency virus destabilizes lamellar and promotes hexagonal phase, leading to the speculation that it has an effective negative intrinsic curvature.
  • Both vaccines were designed against SHIV, a virus containing components of HIV and the related monkey virus, simian immunodeficiency virus.
1.1 derogatory Resembling a monkey: his simian features
More example sentences
  • Apparently, a simian line is a feature in palmistry that he displays.
  • Carlos is up next, and seems to rather frighten James and his simian features somewhat by being chatty before his performance.
  • ‘Water, big!’ said the ape-man, a reverence extending across his human-simian features.


An ape or monkey.
Example sentences
  • We call these creatures Pro simians (meaning before the simians or apes).
  • In this age of growing animal-empowerment, do you think monkeys and other simians should be allowed to drink, if they so desire?
  • Actors playing the simians choreograph ape-like movements with ease.


Early 17th century: from Latin simia 'ape', perhaps via Latin from Greek simos 'flat-nosed'.

Words that rhyme with simian

Endymion, prosimian, Simeon
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