/ Dictionary / Index O ordinary seaman: Meaning and Definition of Find definitions for: or'dinary sea'man Pronunciation: [key] a seaman insufficiently skilled to be classified as an able-bodied seaman. Abbr.: O.D., O.S., o.s. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ordinary ray ordinary share Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language