1. (

• alluvion

) gradual formation of new land, by recession of the sea or deposit of sediment ;

2. (

• flood ,
• inundation ,
• deluge ,
• alluvion

) the rising of a body of water and its overflowing onto normally dry land; "plains fertilized by annual inundations" ;

3. (

• alluvial_sediment ,
• alluvial_deposit ,
• alluvium ,
• alluvion

) clay or silt or gravel carried by rushing streams and deposited where the stream slows down ;