There's the knob. There's the knob.

One knob is the knob for controlling global temperature.

Maybe another knob is a knob for controlling CO2 concentrations.

Just a little knob. It's a radio and has a knob.

Turn the knob and open the door.

Now put your hand on the knob.

It has a little knob that you turn.

The object was the knob on the closet door.

A little knob, that's right. Yeah. Maybe it's in here.

I'll lock the door and hook a chair under the knob.

Just put your hand on the knob, turn it to the left.

I've got the knob for this job, so let's get on with it.

In the 1950s they tried their best to muffle this sound with mercury switches and silent knob controls.

The waiter, you know, came out with the white truffle knob and his shaver, and he shaved it onto my pasta and he said, you know, Would Signore like the truffles?

And what we re doing is we re using humor as a sort of neuroscientific probe by switching humor on and off, by turning the knob on a joke now it s not funny ... oh, now it s funnier ...

But then I knew from experience and looking around in offices where there were chairs with headrests that nobody would ever bother to reach back and turn a knob and adjust the headrest to put it in position.