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Definition of "diagonal" []

  • Mathematics Joining two nonadjacent vertices of a polygon. (adjective)
  • Mathematics Joining two vertices of a polyhedron not in the same face. (adjective)
  • Having a slanted or oblique direction. (adjective)
  • Having oblique lines or markings. (adjective)
  • Relating to or being the front left and back right feet or the front right and back left feet of a quadruped. (adjective)

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 "diagonal" in a sentence
  • "No. 419: that the _red diagonal_ members represent the _saltire gules_ of St. Patrick, No. 421, and that the _narrow diagonal white_ lines are added in order to place this _saltire gules on a field argent_: that the"
  • "A square blanket, twelve feet in diagonal, is provided, (some were wont to cut off the corners, and make it circular;) in the centre a slit is effected, eighteen inches long; through this the mother-naked trooper introduces his head and neck, and so rides shielded from all weather, and in battle from many strokes (for he rolls it about his left arm); and not only dressed, but harnessed and draperied."
  • "First of all u must understant that the roads of Bucharest are already full of cars that make around 1.30 hours for a simple trip from a part of Bucharest in diagonal … At least!"