standard

a basis for comparison; a reference point against which other things can be evaluated

“the schools comply with federal standards”

conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind

“windows of standard width”

established or well-known or widely recognized as a model of authority or excellence

“a standard reference work”

any distinctive flag

conforming to the established language usage of educated native speakers

“standard English”

the ideal in terms of which something can be judged

“they live by the standards of their community”

the value behind the money in a monetary system

regularly and widely used or sold

“a standard size”

a board measure = 1980 board feet

an upright pole or beam (especially one used as a support)

“distance was marked by standards every mile”

commonly used or supplied

“standard procedure”