Overboord means “overboard,” in the literal sense of going over the side of the ship. It is one of many Dutch nautical terms that made its way into English.
Example: Gerrit Engels Mooi
Harlingen, 22 August 1838
Recorded an extract of a death record created on board of the Dutch “smakschip” [light coastal ship] De Waakzaamheid [the watchfulness] which indicates that Gerrit Engelse Mooi, age 42, mate on said ship, born in Oude Pekela, living in Harlingen, husband of Marijtje Alderts, without occupation living in that location, and son of Engel Jans Mooi and Trijntje Piekes,
fell overboard of said ship on 4 August of this year at 10 PM, fell into the sea and drowned.
This record is a rare example of a death record that shows the cause of death, as that was usually not recorded.