Meanings of certain vagueness in English

There is a certain vagueness in the Socialists' presentation of their case.

Since that day she had grumbled about him again, but discreetly, with a certain vagueness.

Her eyes, set remarkably far apart, had a certain vagueness and a great innocence of expression.

Constance assented, with a certain vagueness.

But Max maintained a certain vagueness as to his plans, which Hickson, having accomplished his purpose, did not notice.

An air of quiet authority hung about him like an old comfortable cloak, only slightly undermined by a certain vagueness in his gaze.

It would become the craze of the million but for a certain vagueness in its principles, a certain lack of appeal to direct energies.

The eyes were deep set and small, the nose was short and thick and possessed a certain vagueness of outline not easy of description.

The modern genius is Gothic, and demands in art a certain vagueness and spirituality like that of music, refusing to be grasped and formulated.

We must once more confine ourselves to the most important, mind seek to determine, either absolutely or with a certain vagueness, their several positions.