'Gault' definitions:

Definition of 'Gault'

From: GCIDE

Gault \Gault\, n. [Cf. Norw. gald hard ground, Icel. gald hard snow.] (Geol.) A series of beds of clay and marl in the South of England, between the upper and lower greensand of the Cretaceous period. [1913 Webster]