Definitions

1. adverb

situated at or near the rear of a ship or boat, or situated at or near the rear of something.

“The helmsman stood abaft the wheel.”

2. preposition

situated at or near the rear of a ship, boat, or other vessel, or situated at or near the rear of something.

“The passenger was standing abaft the stern.”

3. noun

the after part of a ship or boat, or the rear part of something.

“The abaft of the vessel was exposed to the storm.”