/ Dictionary / Index A Abelian: Meaning and Definition of Find definitions for: A•be•li•an Pronunciation: (u-bē'lē-un, u-bēl'yun), [key] — adj. Math. of or pertaining to Niels Henrik Abel or his theorems. pertaining to an algebraic system in which an operation is commutative: an Abelian group. pertaining to such an operation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. abelia Abe Lincoln in Illinois* Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language