noun
window
WIN-doh/ˈwɪndəʊ/
An opening that provides a view or access through a barrier.
Sunlight streams through the kitchen window onto the floor.

Etymology
The literal “wind eye” originally named an unglazed roof opening that admitted air or light. The name remained applicable when such openings became fitted with glass.
In context
old window was barely functional and had single pane glass really it was just kind of a mess replacement windows are actually pretty easy
More examples
- She buys two tickets at the ticket window.
- His letters offer a window into his childhood.
- We have a short window of opportunity to finish repairs.
- The document opens in a new window on my screen.
Forms
window · windows
windowless adjective — Having no windows to admit light.
Similar words
- opening
- A general gap, not necessarily intended for viewing.
- porthole
- A small, usually round window in a ship.