Presupposition
Pronunciation : Pre*sup`po*si"tion
Part of Speech : n.
Etymology : [Pref. pre- + supposition: cf. F. pr?supposition.]
Definition : 1. The act of presupposing; an antecedent implication; presumption.
2. That which is presupposed; a previous supposition or surmise.
Source : Webster's Unabridged Dictionary, 1913