Source : Webster's Revised Unabridged Dictionary (1913)

Costermonger \Cos"ter*mon`ger\ (k?s"t?r-m?n`g?r), n. [See
   {Costard}.]
   An apple seller; a hawker of, or dealer in, any kind of fruit
   or vegetables; a fruiterer. [Written also {costardmonger}.]

Source : WordNet®

costermonger
     n : a hawker of fruit and vegetables from a barrow [syn: {barrow-man},
          {barrow-boy}]