(authorship) A screenplay for a movie that is shopped or sold on the open market, as opposed to one commissioned by a studio or production company.

(colloquial) mass spectrometer

Of a species, not listed as a Species of European Conservation Concern, therefore, having a stable population (according to this classification scheme).

present participle of spec up

simple past tense and past participle of spec up

(transitive, UK, informal) To improve or optimize the attributes of (something).

A home that is built for a homebuilder according to their specifications without a sales order.

(slang, UK) A user or fan of the Sinclair ZX Spectrum computer.

plural of Spec-chum

(US) Of the grade and quality used by the military.