A very short period of time; a moment.
She paused for only an instant, which was just enough time for John to change the subject.
A single, usually precise, point in time.
The instant the alarm went off, he fled the building.
A beverage or food which has been pre-processed to reduce preparation time, especially instant coffee.
A camera that uses self-developing film to create a chemically developed print shortly after the photograph is taken.