D defs.my
Entry 2 senses Webster, 1913

Resonant

/(-nant)/ · Res·o·nant · IPA /ˈɹɛzənənt/
01 a. Returning, or capable of returning, sound; fitted to resound; resounding; echoing back.
  1. 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. 2.
    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.(Elec.)