Porthole

A porthole is a circular window on a ship or aircraft, designed to let in light and air while maintaining a watertight or airtight seal. Traditionally, portholes were made of thick glass, often reinforced with metal frames, and were small in diameter to withstand the pressure of the surrounding water or air. They typically feature a hinged, often circular, cover, which can be closed to seal the opening. The design prioritizes structural integrity and protection from the elements, playing a crucial role in maintaining a safe and comfortable environment inside the vessel or aircraft. Their round shape helps distribute pressure evenly, minimizing stress points, and they are often used in conjunction with other ventilation systems.

Porthole meaning with examples

• The sailor peered through the porthole, watching the waves crash against the ship's hull. The small round window offered a limited view of the turbulent sea, but it was enough to give him a sense of the storm's intensity and the ship's position. He kept it closed tight during the rough waves.
• Passengers on the submarine gathered around the portholes to observe the underwater environment. They were fascinated by the colorful coral reefs, the schools of fish, and the eerie darkness that seemed to envelop them as they sank deeper. The tour guide said not to open them under any circumstances.
• The maintenance crew found a crack in the porthole of the airplane and immediately sealed it, preventing any further damage or compromise of the plane’s structural integrity. They ensured it remained secure and airtight, prioritizing the safety of the passengers and crew. They planned a full replacement during the next scheduled maintenance.
• From the porthole of the orbiting spacecraft, the astronauts gazed in wonder at the Earth. They marveled at the swirling clouds, the vast oceans, and the continents spread out before them in a panorama of blue and green. The porthole gave them a connection to their home planet.