/ Dictionary / Index S secos: Meaning and Definition of Find definitions for: se•cos Pronunciation: (sē'kōs, -kôs), [key] — n. sekos. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Second World War secrecy Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language