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Definition of "thumb" []

  • The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits. (noun)
  • A corresponding digit in other animals, especially primates. Also called pollex. (noun)
  • The part of a glove or mitten that covers the thumb. (noun)
  • Architecture An ovolo. (noun)
  • To scan (written matter) by turning over pages with or as if with the thumb. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "thumb" in a sentence
  • "Medical science has proved that there is such a thing as a "thumb centre" in the brain and any pressure or disease in that part of the brain _shows its effect in the thumb_."
  • "_] An expression of contempt or insult, which consisted in thrusting the thumb between two of the closed fingers, or into the mouth; whence _Bite the thumb_."
  • "The last photo in the thumb is his – great shot …."