2. Increase by something added; that which is added;
augmentation from without; as, an accession of wealth or
territory.
The only accession which the Roman empire received
was the province of Britain. --Gibbon.
3. (Law)
(a) 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). Thus, the owner of
a cow becomes the owner of her calf.
(b) The act by which one power becomes party to
engagements already in force between other powers.
--Kent.
4. The act of coming to or reaching a throne, an office, or
dignity; as, the accession of the house of Stuart; --
applied especially to the epoch of a new dynasty.
5. (Med.) The invasion, approach, or commencement of a
disease; a fit or paroxysm.
Syn: Increase; addition; augmentation; enlargement.