What is "improbableness"

Improbable \Im*prob"a*ble\, a. [L. improbabilis; pref. im- not + probabilis probable: cf. F. improbable. See Probable.] Not probable; unlikely to be true; not to be expected under the circumstances or in the usual course of events; as, an improbable story or event.

He . . . sent to Elutherius, then bishop of Rome, an improbable letter, as some of the contents discover.
--Milton. -- Im*prob"a*ble*ness, n. -- Im*prob"a*bly, adv.

n. the quality of being improbable [syn: improbability] [ant: probability]