He changed into his wolf form and covered many miles, senses alert for the presence of prey.

His senses alert him to the armed suspect nobody realizes is there.

Logan moved quickly down the hallway, keeping all his senses alert.

You will need all your senses alert in the morning.

Maybe a sense of his impending doom alerted the terrorist leader.

She led the way upstream, weapon ready, all senses alert.

He swung through the silence of the financial district for several minutes, but his senses alerted him to nothing.

One morning she'd woken from a dream of them, all her senses alert.

A sixth sense alerted him to approaching danger from above and to his left.

Pete and I both came erect at about the same moment, our senses alert.