Webster's Revised Unabridged Dictionary · 1913

Resonant

Resonant (-nant) , adjective

[Latin resonans, present participle of resonare to resound: compare French résonnant. See Resound.]

1.
Returning, or capable of returning, sound; fitted to resound; resounding; echoing back.
Through every hour of the golden morning, the streets were resonant with female parties of young and old. — De Quincey
2.
(Electricity) Adjusted as to dimensions (as an electric circuit) so that currents or electric surgings are produced by the passage of electric waves of a given frequency.