an instrument for detecting the presence of a particular frequency by means of resonance.
4.
Electronics.
a.
a hollow enclosure (cavity resonator) made of conducting material of such dimensions that electromagnetic radiation of a certain frequency willresonate.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a scrap or morsel of food left at a meal.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a gadget; dingus; thingumbob.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.