What is "on and off"

Usage examples of "on and off".

The man wrote this from a mental asylum where he remained on and off for sixteen years.

He opens doors, turns lights on and off, and he's learning to type.

It was a means of communication that all animals used, on and off, even when, as many of them did, they possessed a tribal speech of their own.

Of course sometimes those were the ones that came on and off the block so fast you couldn't get a decent look at them.

You don't look like her and know how to turn the waterworks on and off without knowing how to keep your mascara from running too.

The first is not realizing that so-called opposites, such as light and darkness, sound and silence, solid and space, on and off, inside and outside, appearing and disappearing, cause and effect, are poles or aspects of the same thing.

Taps and lights were switched on and off, and every night, about nine o'clock, I heard a spirit walking about the house with heavy footsteps.

Also, I've got on earrings shaped like Christmas tree lights that actually blink on and off.

The quality of his nerve (as well as his foolhardiness) is shown by the fact that he once carried a dress-suit case full of the explosive around the city, jumping on and off street cars, and dodging vehicles.

He turned the emergency light on and off, as well as the climate control, the sensors and the picture screen.