WordNet sense 1 (the value behind the money in a monetary system):

monetary standard

WordNet sense 2 (a basis for comparison; a reference point against which other things can be evaluated):

criterion, measure, touchstone

WordNet sense 3 (judged to be in conformity with approved usage):

accepted

WordNet sense 4 (conforming to the established language usage of educated native speakers):

received

WordNet sense 5 (routine):

stock

WordNet sense 6 (prescribed by or according to regulation):

regulation

WordNet sense 7 (adhering to established standards and principles):

classic

WordNet sense 8 (reduced to the simplest and most significant form possible without loss of generality):

basic

WordNet sense 9 (of recognized authority or excellence):

authoritative, definitive

WordNet sense 10 (having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual):

common