not damped; specif.,
- not disheartened or discouraged
- Elec. not decreasing in amplitude
- Physics Not tending toward a state of rest; not damped. Used of oscillations.
- Not stifled or discouraged; unchecked: undamped ardor.
- (physics, of a linear dynamic system) Possessing a damping ratio of exactly zero.
- (Possessing a damping ratio of exactly zero): damped