With an undefined feeling of awe, she looked in the countenance of her friend.

The position of the reputed slave in England was undefined and doubtful.

With its keen sensitive-ness and its undefined melancholy it was a dreamer's face.

The reason is that the negative proposition has really passed into an undefined positive.

Quaking with undefined fears, he pushed on until he had joined them.

My notions, many of them, I am now aware, were crude and undefined.

The ocean has marked three boundaries to it, but the fourth is undefined.

I seek to define a part of the limitless and undefined mysteries of the body.

At first sight he had struck her as undefined, characterless.

There had been an undefined sense of unrest, of difference, of broken equilibrium.