5. Lacking characteristics which give variety; as, a blank desert; a blank wall; destitute of interests, affections, hopes, etc.; as, to live a blank existence; destitute of sensations; as, blank unconsciousness.
6. Lacking animation and intelligence, or their associated characteristics, as expression of face, look, etc.; expressionless; vacant. "Blank and horror-stricken faces." C. Kingsley.
The blank . . . glance of a half returned consciousness.
G. Eliot.