Longman Dictionary of Contemporary English
Wiktionary
n. civilian naval fleet dedicated to the sea transport of goods and merchandise
Wikipedia
The Merchant Navy is the maritime register of the United Kingdom, and describes the seagoing commercial interests of UK-registered ships and their crews. Merchant Navy vessels fly the Red Ensign and are regulated by the Maritime and Coastguard Agency (MCA). King George V bestowed the title of "Merchant Navy" on the British merchant shipping fleets following their service in the First World War; a number of other nations have since adopted the title.
A merchant navy or merchant marine is the fleet of merchant vessels that are registered in a specific country. On merchant vessels, Seafarers of various ranks and sometimes members of maritime trade unions are required by the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW) to carry Merchant Mariner's Documents.
King George V bestowed the title of the "Merchant Navy" on the British merchant shipping fleets following their service in the First World War; since then a number of other nations have also adopted use of that title or the similar "Merchant Marine." The following is a partial list of the merchant navies or merchant marines of various countries. In many countries the fleet's proper name is simply the capitalized version of the common noun ("Merchant Navy").
Usage examples of "merchant navy".
I came right out of grammar school at seventeen because the only other choice I bad at home was joining the merchant navy or living off my father.