capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability | established or well-known or widely recognized as a model of authority or excellence |
brought into conformity with a standard | conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind |
| conforming to the established language usage of educated native speakers |
| commonly used or supplied |
| regularly and widely used or sold |