late 14c., from O.Fr. fugitif, from L. fugitivus "fleeing" (but commonly used as a noun meaning "runaway"), from stem of fugere "run away, flee," from PIE base *bheug- "to flee" (cf. Gk. pheugein "to flee," Lith. bugstu "be frightened"). Replaced O.E. flyma. From 17c.-19c. English had the useful adj. fugacious "likely to flee."