Advertisement - Continue reading below

Definition of "beak" []

  • The horny, projecting structure forming the mandibles of a bird, especially one that is strong, sharp, and useful in striking and tearing; a bill. (noun)
  • A similar structure in other animals, such as turtles, insects, or fish. (noun)
  • A usually firm, tapering tip on certain plant structures, such as some seeds and fruits. (noun)
  • A beaklike structure or part, as: (noun)
  • The spout of a pitcher. (noun)

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 "beak" in a sentence
  • "Size, shape, and strength of chick beak is impacted when the gene is manipulated."
  • "As the Yoon paper states, you have this large diversity of finch species marked off by variations in beak size."
  • "However, this only works when the base of the beak is wet."