an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a gadget; dingus; thingumbob.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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 calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
also matter of fact, 1570s, originally a legal term (translating L. res facti), "that portion of an enquiry concerned with the truth or falsehood of alleged facts," opposed to matter of law. Meaning "prosaic, unimaginative" is from 1787.