WordWeb Online

1. Marked by rude or peremptory shortness
   "a curt reply";
   - brusque, brusk [non-standard], short, snippy
    
2. Brief and to the point; effectively cut short
   "a response so curt as to be almost rude";
   - crisp, laconic, terse

Derived forms: curtest, curter

See also: concise, discourteous, ignorant

Encyclopedia: Curt