flee (flē) v. fled (flĕd), flee·ing, flees v.intr. 1. To run away, as from trouble or danger: fled from the house into the night. 2. To pass swiftly away; vanish: “of time fleeing beneath him” (William Faulkner). v.tr. To run away from: flee the scene of an accident. [Middle English flen, from Old English flēon; see pleu- in Indo-European roots …