Increase by something added; that which is added; augmentation from without.
(law) A mode of acquiring property, by which the owner of a corporeal substance which receives an addition by growth, or by labor, has a right to the part or thing added, or the improvement (provided the thing is not changed into a different species).
(law) The act by which one power becomes party to engagements already in force between other powers.
The act of coming to or reaching a throne, an office, or dignity.
(medicine) The invasion, approach, or commencement of a disease; a fit or paroxysm.