Source : Webster's Revised Unabridged Dictionary (1913)

Eldest \Eld"est\, a. [AS. yldest, superl. of eald old. See
   {Elder}, a.]
   1. Oldest; longest in duration. --Shak.

   2. Born or living first, or before the others, as a son,
      daughter, brother, etc.; first in origin. See {Elder}.
      ``My lady's eldest son.'' --Shak.

            Their eldest historians are of suspected credit.
                                                  --Bp.
                                                  Stillingfleet.

   {Eldest hand} (Card Playing), the player on the dealer's left
      hand. --R. A. Proctor.

Source : WordNet®

eldest hand
     n : the card player on the dealer's left [syn: {elder hand}]