an oath administered to a proposed witness or juror by which he or she is sworn to speak the truth in an examination to ascertain his or her competence.
2.
the examination itself.
Origin: 1670–80; < Anglo-French, equivalent to Old French voir true, truly + dire to say
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a fool or simpleton; ninny.
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.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a gadget; dingus; thingumbob.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.