Bulging of a single eye, especially in a child, is a very serious sign and should be evaluated immediately.

A serious sign, often the best option is to call the veterinarian.

But what's a much more serious sign is the fact that she seems to have felt afraid of someone.

We do not see a serious sign that this will happen.

Yet to date no serious sign of this reform is anywhere in evidence.

But there were no serious signs of radiation burns in either.

Above all, business investment, whose plunge led us into this slump, has yet to show any serious signs of life.

State news media also showed serious signs of unrest.

This paperback showed serious signs of being read and reread.

By 1918 this culture showed serious signs of erosion.