an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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.
1666, earlier stupendious (1547), from L.L. stupendus "to be wondered at," gerundive form of L. stupere "be stunned, be struck senseless" (see stupid).