mid-15c., resonaunce, in acoustics, "prolongation or repetition of sound by reflection, reverberation;" from Old French resonance (15c.) and directly from Latin resonantia "an echo," from resonare "to sound again, sound back" (see resound). Earlier in same sense was resonation (early 15c.). From 1660s as "act of resonating."
updated on July 20, 2021
Dictionary entries near resonance