a. [ Cf. F. concevable. ] Capable of being conceived, imagined, or understood. “Any conceivable weight.” Bp. Wilkins. [ 1913 Webster ]
It is not conceivable that it should be indeed that very person whose shape and voice it assumed. Atterbury.
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a. [ Pref. in- not + conceivable: cf. F. inconcevable. ] Not conceivable; incapable of being conceived by the mind; not explicable by the human intellect, or by any known principles or agencies; incomprehensible;
It is inconceivable to me that a spiritual substance should represent an extended figure. Locke.
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The inconceivableness of a quality existing without any subject to possess it. A. Tucker. [ 1913 Webster ]
a. Inconceivable. [ Obs. ] Locke. --