/ Dictionary / Index Q quisling: Meaning and Definition of Find definitions for: quis•ling Pronunciation: (kwiz'ling), [key] — n. a person who betrays his or her own country by aiding an invading enemy, often serving later in a puppet government; fifth columnist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quisling (Thesaurus) quis custodiet ipsos custodes?* quis separabit?* Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language