noun
also US gage , pl gauges also gages
[count] :an instrument that is used for measuring something
[count] :something that can be used to measure or judge something else - usually singular; often + of
[noncount] :the distance between the rails of a railroad
[noncount] :the thickness of something (such as a sheet of metal) or the diameter of wire or a screw
[noncount] :the size of a shotgun based on how big the inside of the barrel is
verb
also US gage gauges also gages; gauged also gaged; gauging also gaging
[+ obj] to make a judgment about (something)
to measure (something) exactly