ac·ces·sion /ik-'se-shən, ak-/ n
1: increase by something added; specif: the mode of acquiring property by which the owner of property (as a building, land, or cattle) becomes the owner of an addition by growth, improvement, increase, or labor
2: the act of assenting or agreeing
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.