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adjective sea·borne \-ˌbȯrn\

Simple Definition of seaborne

  • : carried in a ship sailing across the sea

  • : involving or using ships that sail across the sea

Source: Merriam-Webster's Learner's Dictionary

Full Definition of seaborne

  1. 1 :  borne over or on the sea <a seaborne invasion>

  2. 2 :  carried on by oversea shipping <seaborne trade>

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