adj. & n.
--adj.
1. (also super-duper) colloq. (also as int.) exceptional; splendid.
2 Commerce superfine.
3 Commerce (of a measure) superficial, in square (not lineal or solid) measure (120 super ft.; 120 ft. super).
--n. colloq.
1. Theatr. a supernumerary actor.
2 a superintendent.
3 superphosphate.
4 an extra, unwanted, or unimportant person; a supernumerary.
5 Commerce superfine cloth or manufacture.
Etymology: abbr.