/ Dictionary / Index I insider trading: Meaning and Definition of Find definitions for: in'sider trad'ing Pronunciation: [key] the illegal buying and selling of securities by persons acting on privileged information. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. insider inside straight Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language