Incapable of being conceived, or realized in the imagination; incredible; inexplicable.An expression which conveys no conception whatever, but is mere gibberish, is not called inconceivable, but unintelligible. The word inconceivable (see also unconceivable) is used in the following senses in philosophy: Involving a contradiction in terms, such as the idea of a non-existent being.Unacceptable to the mind because involving a violation of laws believed to be well established by positive evidence, as a perpetual motion.Unimaginable by man on account of an inseparable association, although not perhaps involving any contradiction nor even physically impossible, as the perception of color without extension.Unimaginable to a particular person from novelty, as the idea that parallel straight lines meet at infinity.Capable of being conceived only by a negative or relaive notion, such as the idea of infinity.Incredible; not to be imagined as believed in by any man, as the supposition of an event undetermined by a cause.