Each of a series of raised terraces alongside a river that are the remnants of former flood plains, river beds, etc., formed during earlier periods of erosion and deposition.
Origin
Early 19th century.
Definition of river terrace in US English:
river terrace
noun
Physical Geography
Each of a series of raised terraces alongside a river that are the remnants of former flood plains, river beds, etc., formed during earlier periods of erosion and deposition.