(adjective) closer to the stern than to another place on a vessel
(preposition) behind; aft of
Use "abaft" in a sentence
"The bunk next on the port side to the cook's and abaft of it"
"The next one abaft of his own he named "Killeny Boy's," and called on"
"Her interior was wholly rebuilt, so that the hold became main-cabin and staterooms, while abaft amidships were installed engines, a dynamo, an ice machine, storage batteries, and, far in the stern, gasoline tanks."