Imperceptible.

Imperceptible.

Incapable by its nature of being perceived by the mind or senses; invisible. In early use esp.: incapable of being comprehended (cf. perceive, v. 5).

= undiscernible, adj. (Common in 17th cent.)

Incapable of being perceived; = imperceptible, adj. (in either sense).

= indiscernible, adj.

Of a thing or phenomenon: not affecting, or detectable by, the senses; imperceptible. Obsolete.

= unperceptible, adj.

poetic and literary. That cannot be perceived; imperceptible. Obsolete.

Transcending the senses; that is above or beyond what is perceptible by the senses. Cf. earlier supersensual, adj. 1.

Existing below the level of the senses.

Transcending the senses; that is above or beyond what is perceptible by the senses; = supersensible, adj.