This was a signal event as well as a musically rewarding one.

His performance that weekend helped pull together a nation stricken with grief and was a signal event in television's evolution into the national nervous system.

That would hardly seem like a signal event to anyone outside the industry; the exchange handles less than 2 percent of the cheese market.

They were prompted by two signal events in December 1993.

It has been called a "signal event" of the era.

But even getting a product on the market, which was once the signal event in a company's life, might no longer be enough.

Absorbed in the role he liked best, he had managed to miss the signal events of his lifetime.

The Plane was the site of a signal event in railroad history.

Lately, however, supernovas have become signal events in the life of the cosmos, as told by modern science.

The indictment, the first against a former Mexican president, was considered a signal event.