Source : Webster's Revised Unabridged Dictionary (1913)

Dickey \Dick"ey\, Dicky \Dick"y\, n.
   1. A seat behind a carriage, for a servant.

   2. A false shirt front or bosom.

   3. A gentleman's shirt collar. [Local, U. S.]

Source : WordNet®

dicky
     adj : (British informal) faulty; "I've got this dicky heart"- John
           le Carre [syn: {dickey}]

dicky
     n 1: a small third seat in the back of an old-fashioned
          two-seater [syn: {dickey}, {dickie}, {dickey-seat}, {dickie-seat},
           {dicky-seat}]
     2: a man's detachable insert (usually starched) to simulate the
        front of a shirt [syn: {dickey}, {dickie}, {shirtfront}]