mistrim noun 1verb 1forms 3 noun1 •The act or an instance of mistrimming.This removes the possibility of a disengage transient due to mistrim when the attitude hold mode is disengaged. — 1967 verb1 •To trim badly or wrongly.Watch the pitch trim and be ready to punch off the autopilot if it starts to mistrim the aircraft. — 1972 formsmistrimmed · mistrimming · mistrims