ALL meanings of ordinary seaman
or·di·nar·y sea·man
O o - noun ordinary seaman a seaman insufficiently skilled to be classified as an able-bodied seaman. Abbreviation: O.D., O.S., o.s. 1
- noun ordinary seaman unskilled sailor 1
- noun ordinary seaman a seaman of the lowest rank, being insufficiently experienced to be an able-bodied seaman 0
- noun ordinary seaman a merchant seaman of less experience than, and ranking below, an able-bodied seaman 0