Source : Webster's Revised Unabridged Dictionary (1913)

Subordinate \Sub*or"di*nate\, v. t. [imp. & p. p.
   {Subordinated}; p. pr. & vb. n. {Subordinating}.]
   1. To place in a lower order or class; to make or consider as
      of less value or importance; as, to subordinate one
      creature to another.

   2. To make subject; to subject or subdue; as, to subordinate
      the passions to reason. -- {Sub*or"di*nate*ly}, adv. --
      {Sub*or"di*nate*ness}, n.

Source : WordNet®

subordinating
     adj : serving to connect a subordinate clause to a main clause;
           "`when' in `I will come when I can' is a subordinating
           conjunction" [syn: {subordinating(a)}, {subordinative}]
           [ant: {coordinating(a)}]