Observation or the act of watching.
The practice of complying with a law, custom, command or rule.
That which is to be observed.
A rule governing a religious order, especially in the Roman Catholic church.
The custom of celebrating a holiday or similar occasion.
Reverence; homage.
A viewing window.
A typically rectangular region representing the range or area currently visible (within a window, screen, etc.).
To clip (an image or region) so that it fits in a viewport.