Definition of Q-ship in English:

Q-ship

noun

historical
  • A merchant ship with concealed weapons, used by the British in the First and Second World Wars in an attempt to destroy submarines.

    • ‘U-boats were attacked by aircraft, airships, Q-ships, mines, drifters, Naval vessels (including submarines) and merchant ships.’
    • ‘The Eastern Sea Frontier, which operated the few Q-ships the US Navy used during the war, was the parent organization.’

Origin

First World War: from Q as a non-explicit symbol of the type of vessel + ship.

Pronunciation

Q-ship

/ˈkjuːʃɪp/