† fosse-graven. [apparently < fossen.1 + graven.3] Obsolete (perhaps) an officer charged with the repair and maintenance of ditches.It is possible that Adam le Fossegrave (see quot.), who was a resident of York, may have had more specific responsibilities relating to the (canalized) River Foss, which passes through the city.
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1309 Patent Roll, 2 Edward II 8 Mar. (P.R.O.: C 66/131) m. 11v Adam le Fossegrayue.