The quality or condition of not being clearly known or understood. Also in figurative contexts (cf. 4). Now rare.

A state of obscurity, uncertainty, or bewilderment; an atmosphere of doubt.

clouded light, dim light (also figurative).

The quality of being indeterminate; vagueness, indefiniteness, want of exactness, etc.

(un-, prefix1 affix 6.)

The quality of being indeterminate; want of determinateness or definiteness.

Indistinctness, obscurity, dimness. Obsolete.

(un-, prefix1 affix 6.)

The quality or fact of being inestimable.

The quality of being confused, indistinct, or obscure: said of objects of sensuous or mental attention.

The action of darkening or fact of being darkened with or as with a cloud; obscuration; (Medicine) obscuring or clouding of the mind or faculties.

figurative (see cloudy, adj. 5 6).

The quality or condition of being indistinct; obscurity, dimness. (In reference to either sensuous… As a quality of perception or thought: cf. indis…

figurative. A condition of intellectual vagueness and indistinctness; a state of mental confusion. Also: an immaterial thing conceived as obscuring a…

figurative. Vagueness; uncertainty; absence of mental clarity; mental confusion or befuddlement, spec. from taking alcoholic drink or drugs.

The quality or condition of being vague; lack of distinctness or preciseness; indefiniteness.

figurative. Vagueness; indistinctness; lack of exactness, precision, or certainty; (also) a vague, indistinct, or uncertain person or thing.

the quality or state of being undecided.

= indeterminacy, n.

figurative. A state or condition of obscurity or confusion; something designed to confuse or obscure.