adj.1 (of sound) echoing, resounding; continuing to sound; reinforced or prolonged by reflection or synchronous vibration.
2 (of a body, room, etc.) tending to reinforce or prolong sounds esp. by synchronous vibration.
3 (often foll. by with) (of a place) resounding.
4 of or relating to resonance.
Derivatives:
resonantly adv.
Etymology: F r{eacute}sonnant or L resonare resonant- (as RE-, sonare sound)