'Shipper' definitions:

Definition of 'shipper'

From: WordNet
noun
Someone who ships goods
noun
A company in the business of shipping freight

Definition of 'Shipper'

From: GCIDE
  • Shipper \Ship"per\, n. [See Ship, n., and cf. Skipper.] One who sends goods from one place to another not in the same city or town, esp. one who sends goods by water. [1913 Webster]