Hatch meaning : A horizontal door in a floor or ceiling. A trapdoor. An opening in a wall at window height for the purpose of serving food or other items. A pass through. A small door in large mechanical structures and vehicles such as aircraft and spacecraft often provided for access for maintenance. An opening through the deck of a ship or submarine A gullet. A frame or weir in a river, for catching fish. A floodgate; a sluice gate. A bedstead. An opening into, or in search of, a mine. To close with a hatch or hatches.