Definition of corrasion:
(n) :
The wearing away of surface material.
(n) :
(geology) Corrading (erosion by abrasion) caused by such as: wind-blown or water-borne sand, stream-borne or glacier-borne stones, or collisions between stones under the influence of seaside breakers.
(n) :
(obsolete) The diminution of wealth, etc., such as through unanticipated expenditure.