The rotation of the planet would make that huge bright beam flash around the sky, a quite obvious signal!

It was an obvious signal to the man dressed in butler's uniform who stepped from the secret elevator.

How long will we keep ignoring such obvious signals?

But less obvious signals - a raised eyebrow or impatient glance at a watch - elude her.

Gestures are the most obvious signal, for instance greeting someone with open arms is generally a sign that a hug is expected.

I have a more obvious but still pleasurable signal, which always takes me by surprise.

The obvious signal was that the play was going to be a run, and it was, for a modest gain.

Luggage is an obvious signal to criminals that you've just arrived.

But the college grades business is just such an obvious signal to white conservatives that Trump doesn't even care what people think.

He nodded at Greene, an obvious signal to continue.