/ Dictionary Meaning of Nyx Find definitions for: Nyx Pronunciation: (niks), [key] — n. an ancient Greek goddess personifying night. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nyx (Thesaurus) Nyungar N.Z. Related ContentDaily Word Quiz: opprobriumAnalogy of the Day: Today's AnalogySpelling Bee: Today's Spelling BeeKids' Word Quiz: preparatoryCrossword: Crossword Puzzle GuideFrequently Misspelled WordsFrequently Mispronounced WordsEasily Confused WordsWriting & Language