/ Dictionary / Index P perilune: Meaning and Definition of Find definitions for: per•i•lune Pronunciation: (per'i-ln"), [key] — n. the point in a lunar orbit that is nearest to the moon. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perilune (Thesaurus) peril point perilymph Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language