aftermost adjective 2adverb 1 adjective2 •Nearest the stern of a vessel; farthest aft.All the after-most part of the ship, is called the sterne (by a generall appellation) but most exactly considered, only the very outwardmost part abaft is the sterne — 1644 •(no longer used) Most recent.Now whiles I was taken up with these anxious thoughts, a messenger […] came to me from the Lord Denny […], my after-most Honourable Patron, entreating me from his Lordship to speak with him. — 1663 adverb1 •(no longer used) At the very back.And he put the handmaids and their children, first: and Leah and her children, after; and Rachel and Ioseph, aftermost. — 1627