The Collaborative International Dictionary of English v.0.48:

Editorial \Ed`i*to"ri*al\, a.
   Of or pertaining to an editor; written or sanctioned by an
   editor; as, editorial labors; editorial remarks.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Editorial \Ed`i*to"ri*al\, n.
   A leading article in a newspaper or magazine; an editorial
   article; an article published as an expression of the views
   of the editor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

editorial
    adj 1: of or relating to an article stating opinions or giving
           perspectives; "editorial column"
    2: relating to or characteristic of an editor; "editorial
       duties"
    n 1: an article giving opinions or perspectives [syn: column,
         editorial, newspaper column]