Definition of box-standard in English:

box-standard

adjective

British
informal
  • Informal (chiefly British). In motoring, engineering, and other technical contexts: in standard manufactured form, unmodified; (hence) basic, unexceptional.

Origin

Late 19th century (in an earlier sense). From box + standard.

Pronunciation

box-standard

/ˌbɒksˈstandəd/