porthole

/ˈpɔːrthoʊl/
noun
  1. A small round window on a ship or aircraft, used for light and ventilation.
    • The cabin had a porthole that looked out over the ocean.
    • He pressed his face against the porthole to watch the dolphins.
    • The submarine's porthole was made of thick glass.
  2. A similar small window in a spacecraft or other vehicle.
    • The space capsule had a small porthole for observation.
    • Through the porthole, they saw the stars shining brightly.
    • The astronaut looked through the porthole at the Earth below.
Synonyms
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