in Law, is a discharge or conveyance of a man's right in lands or tenements, to another that hath some former estate in possession. The words generally used therein are "remifed, releafed, and for ever quit-claimed." And these releases may ensue, either, 1. By way of enlarging an estate, or enlarger estate: as, if there be tenant for life or years, remainder to another in fee, and he in remainder releaseth all his right to the particular tenant and his heirs, this gives him the estate in fee. But in this case the releasor must be in possession of some estate, for the release to work upon; for if there be leasor for years, and, before he enters and is in possession, the lessor releaseth to him all his right in the reversion, such release is void for want of possession in the releasor. 2. By way of passing an estate or mitter l'estate: as when one of two coparceners releaseth all his right to the other, this passeth the fee-simple of the whole. And, in both these cases, there must be a privyty of estate between the releasor and releasor; that is, one of their estates must be so related to the other, as to make but one and the same estate in law. 3. By way of passing a right or mitter le droit: as if a man be disseised, and releaseth to his disseisor all his right; hereby the disseisor acquires a new right, which changes the quality of his estate, and renders that lawful which before was tortious. 4. By way of extinguishment: as if my tenant for life makes a lease to A for life, remainder to B and his heirs, and I releaseth to A; this extinguishes my right to the reversion, and shall ensue to the advantage of B's remainder as well as of A's particular estate. 5. By way of entry and feoffment: as if there be two joint disseisors, and the disseisor releaseth to one of them, he shall be sole seised, and shall keep out his former companion; which is the same in effect as if the disseisor had entered, and thereby put an end to the disseisin, and afterwards had enfeoffed one of the disseisors in fee. And hereupon we may observe, that when a man has in himself the possession of lands, he must at the common law convey the freehold by feoffment and livery; which makes a notoriety in the country: but if a man has only a right or a future interest, he may convey that right or interest by a mere release to him that is in possession of the land: for the occupancy of the releasor is a matter of sufficient notoriety already.