|a type of mathematical proposition considered by Euclid, the meaning of which is now obscure. It is thought to be a proposition affirming the possibility of finding such conditions as will render a certain problem indeterminate or capable of innumerable solutions|
|[C14: from Late Latin porisma, from Greek: deduction, from porizein to deduce, carry; related to Greek poros passage]|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|a chattering or flighty, light-headed person.|
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