He went to the ready room doors and stood before them to signal his presence.

Karl had not known who sent him, and for her to attempt to Read any of the others would have been to signal our presence.

"Shall we light a fire, so as to signal our presence on the coast?"

He needed to know what factors signaled the presence of Kh@fflict ruins.

Which is why there was such consternation when it signaled its presence.

A warning light signaled the presence of a pacifier field.

The noise was intended to signal the presence of a chemical or biological weapons.

Therefore it was likely that the metal merely signaled the possible presence of something else the Monsters wanted.

Only the onset of decay would signal the microbes' presence.

Microcalcifications are more worrisome, but do not always signal the presence of cancer.