/euh looh"vee euhn/ , n.
1. Law. a gradual increase of land on a shore or a river bank by the action of water, whether from natural or artificial causes.
2. overflow; flood.
3. Now Rare. alluvium.
[ 1530-40; alluvion- (s. of alluvio an overflowing), equiv. to al- AL- + -luv-, base of -luere, comb. form of lavere to wash) + -ion- -ION ]