/ Dictionary / Index S Sounion: Meaning and Definition of Find definitions for: Sou•ni•on Pronunciation: (s'nē-un), [key] a cape in E central Greece, SE of Athens, at the tip of the Attica peninsula, in W Aegean Sea. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sound wave Sounion Head Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language