NOUN (3)

1. either of a pair of bags or boxes hung over the rear wheel of a vehicle (as a bicycle);

2. a large basket (usually one of a pair) carried by a beast of burden or on by a person;

3. set of small hoops used to add fullness over the hips;

The Collaborative International Dictionary of English v.0.48:

Pannier \Pan"nier\, n. [F. panier, fr. L. panarium a bread
   basket, fr. panis bread. Cf. Pantry.]
   1. A bread basket; also, a wicker basket (used commonly in
      pairs) for carrying fruit or other things on a horse or an
      ass --Hudibras.
      [1913 Webster]

   2. (Mil. Antiq.) A shield of basket work formerly used by
      archers as a shelter from the enemy's missiles.
      [1913 Webster]

   3. A table waiter at the Inns of Court, London.
      [1913 Webster]

   4. A framework of steel or whalebone, worn by women to expand
      their dresses; a kind of bustle.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pannier
    n 1: either of a pair of bags or boxes hung over the rear wheel
         of a vehicle (as a bicycle)
    2: a large basket (usually one of a pair) carried by a beast of
       burden or on by a person
    3: set of small hoops used to add fullness over the hips