The Collaborative International Dictionary of English v.0.48:

Tablespoon \Ta"ble*spoon`\, n.
   A spoon of the largest size commonly used at the table; --
   distinguished from teaspoon, dessert spoon, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tablespoon
    n 1: as much as a tablespoon will hold [syn: tablespoon,
         tablespoonful]
    2: a spoon larger than a dessert spoon; used for serving