People use eye contact to signal threat, intimacy and interest.

Sean raised an eyebrow to signal his interest and attention.

It signaled his strong interest in the use of history and ethnography to understand anthropogenic environmental change.

He wanted to signal his interest in her.

While Democrats had hoped he might signal interest in property tax relief, his speech suggested little enthusiasm for compromise.

So far, about 60 fourth graders, out of a roster of 120, have signaled their interest.

And customers had signaled their interest by responding to winter coats in the stores' fall catalogues.

Did you both just call up his office, and found him willing to give lengthy interviews-or did he signal interest in doing a story?

Other ads can be placed by companies looking to connect with people whose search engine requests have signalled their interest in certain products and services.

But they can signal their interest in visiting one another by "knocking on the doors with their noses."