/ Dictionary / Index S safe sex: Meaning and Definition of Find definitions for: safe' sex' Pronunciation: [key] sexual activities in which precautions have been taken, as by the use of a condom, to minimize the chances of spreading or contracting a sexually transmitted disease. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. safe period safety Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language