No sign of life either on ground or in the air had been observed.

This sign can be observed covering small areas or most of the tree.

I asked her if she had observed, since then, signs of a confidential understanding between you two.

Many sinister signs were observed by those upon the spot.

Country folk are well known to observe signs which indicate the weather.

Maybe they did not become scientists, but significant signs of progress among the judges could be observed as the day wore on.

No signs of struggle were observed by the police.

Diagnosis is made when several characteristic clinical signs are observed.

No obvious signs of forced entry on the vehicle were observed.

The clinical signs have been observed between 1 and 4 years, but as late at seven years.