Resonant \Res"o*nant\ (-nant), a. [L. resonans, p. pr. of resonare to resound: cf. F. r['e]sonnant. See Resound.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Resonant \Res"o*nant\, a. (Elec.) 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.

Source: Webster's Revised Unabridged Dictionary (1913)