1. the rear sections or decks of a ship or boat
Usage: nautical; plural form

Examples

• The crew gathered on the afterdecks to watch the sunset.
• Passengers were not allowed on the afterdecks during rough weather.
• The captain inspected the afterdecks before departure.
• Equipment was stored beneath the afterdecks.
• The afterdecks provided a good view of the ship’s wake.
• Safety railings surrounded the afterdecks.