Meaning of antireflexive

an•ti•re•flex•ive

Pronunciation: (an"tē-ri-flek'siv, an"tī-), [key]
— adj. Math.
  1. noting a relation in which no element is in relation to itself, as “less than.”
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.