The act of increasing by natural growth; esp. the
increase of organic bodies by the internal accession of parts; organic
growth.

The act of increasing, or the matter added, by an
accession of parts externally; an extraneous addition; as, an accretion
of earth.

Concretion; coherence of separate particles; as, the
accretion of particles so as to form a solid mass.

The adhering of property to something else, by which the
owner of one thing becomes possessed of a right to another; generally,
gain of land by the washing up of sand or sail from the sea or a river,
or by a gradual recession of the water from the usual watermark.

Gain to an heir or legatee, failure of a coheir to the
same succession, or a co-legatee of the same thing, to take his share.