The 20th century, however, brought the need for a more precise definition.

Even in the late 1990's, however, it was hard to tie the new economy down to a precise definition.

Information has a precise definition as the state of a system.

The following is a more precise definition of the jet group.

Like many terms of the sort, it does not have a very precise definition.

First, construct a precise definition of what the problem is.

He told us that the term doesn't have a precise definition.

In general, these terms do not have a precise definition.

In the 20th century, people needed a more precise definition.

But energy was not really understood, he said, until people came up with a precise definition.