4. An officer who ascertains the contents of casks, and the quantity of liquors subject to duty; a gauger. In the united states, an officer whose duties include the various measures to be taken for ascertaining the quantity, condition, and value of merchandise brought into a port. Surveyor general. A principal surveyor; as, the surveyor general of the king's manors, or of woods and parks. An officer having charge of the survey of the public lands of a land district. Surveyor's compass. See Circumferentor. Surveyor's level. See Level.