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