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WordReference Random House Unabridged Dictionary of American English © 2024or′dinary sea′man, - Naval Termsa seaman insufficiently skilled to be classified as an able-bodied seaman.[Abbr.:]O.D., O.S., o.s.
Collins Concise English Dictionary © HarperCollins Publishers:: ordinary seaman n - a seaman of the lowest rank, being insufficiently experienced to be an able-bodied seaman
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