noun a small, usually circular window in a vessel or aircraft
Portholes were historically used on military ships for ventilation and observation purposes.
Portholes are sometimes used in architecture as a design element to bring in natural light or as a decorative feature.
A porthole is a small, usually round window on a ship or boat that can be opened to let in fresh air and light.
Portholes can be incorporated into interior design, such as in nautical-themed rooms or bathrooms to add a unique touch.
In aerospace engineering, a porthole may refer to a small window on an aircraft or spacecraft.
In a nautical-themed story, the writer described the ship's cabin with a small porthole letting in a sliver of light.
The psychologist used the metaphor of a porthole to explain how therapy can provide a glimpse into a person's inner thoughts and emotions.
The architect included portholes in the design of the building to allow natural light to enter certain rooms.
The marine biologist observed the underwater world through the porthole of a submarine.