LEGACY, DEMONSTRATIVE. A demonstrative legacy is a bequest of a certain sum of money; intended for the legatee at all events, with a fund particularly referred to for its payment; so that if the estate be not the testator's property at his death, the legacy will not fail: but be payable out of general assets. 1 Rop. Leg. 153; Lownd. Leg 85; Swinb. 485; Ward on Leg. 370.