a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a chattering or flighty, light-headed person.
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.
a stew of meat, vegetables, potatoes, etc.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
1570s, from M.Fr. acerbité, from L. acerbitatem (nom. acerbitas) "harshness, sharpness, bitterness," from acerbus "bitter, sharp, tart" (related to acer "sharp;" cf. L. superbus "haughty," from super "above"), from PIE *ak- "sharp" (see acrid). Earliest use in Eng.