The act of growing to a thing; usually applled to the gradual and Imperceptible accumulation of land by nat-ural causes, as out of the Bea or a river. Accretion of land is of two kinds: By alluvion, i. e., by the washing up of sand or soil, so as to form firm ground; or by dereliction, as when the sea shrinks below the usual water-mark
Source: Black's Law Dictionary 2nd Ed (1910)
