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Thus incorporeal spirits to smaller forms Reduced their shapes immense. Milton. Sense and perception must necessarily proceed from some incorporeal substance within us. Bentley.

Not to be discerned; imperceptible; not discoverable or visible. Secret and indiscernible ways. Jer. Taylor. -- In`dis*cern"i*ble*ness, n. -- In`dis*cern"i*bly, adv.

Not distinct or distinguishable; not separate in such a manner as to be perceptible by itself; as, the indistinct parts of a substance. "Indistinct as water is in water." Shak.

Incapable of being perceived by the senses; imperceptible. Hence: Progressing by imperceptible degrees; slow; gradual; as, insensible motion. Two small and almost insensible pricks were found upon Cleopatra's arm. Sir T. Browne. They fall away, And languish with insensible decay. Dryden.

In a manner not to be felt or perceived; imperceptibly; gradually. The hills rise insensibly. Addison.

Not sentient; not having perception, or the power of perception. The . . . attributes of an insentient, inert substance. Reid. But there can be nothing like to this sensation in the rose, because it is insentient. Sir W. Hamilton.

Power of acute observation and deduction; penetration; discernment; perception. Quickest insight In all things that to greatest actions lead. Milton.

To creep, wind, or flow in; to enter gently, slowly, or imperceptibly, as into crevices.

Done or occurring in an instant, or without any perceptible duration of time; as, the passage of electricity appears to be instantaneous. His reason saw With instantaneous view, the truth of things. Thomson.

Not perceptible to the touch.

Not tangible; incapable of being touched; not perceptible to the touch; impalpable; imperceptible. Bp. Wilkins. A corporation is an artificial, invisible, intangible being. Marshall. -- In*tan"gi*ble*ness, n. -- In*tan"gi*bly, adv.

Direct apprehension or cognition; immediate knowledge, as in perception or consciousness; -- distinguished from "mediate" knowledge, as in reasoning; as, the mind knows by intuition that black is not white, that a circle is not a square, that three are more than two, etc.; quick or ready insight or apprehension. Sagaci…

The doctrine that the perception or recognition of primary truth is intuitive, or direct and immediate; -- opposed to sensationalism, and experientialism.

Incapable of being seen; not perceptible by vision; not visible. To us invisible, or dimly seen In these thy lowest works. Milton. Invisible bird (Zoöl.), a small, shy singing bird (Myadestes sibilons), of St. Vincent Islands. -- Invisible green, a very dark shade of green, approaching to black, and liable to be mista…

The perception attendant upon the movements of the muscles. Bastian.

To have knowledge; to have a clear and certain perception; to possess wisdom, instruction, or information; -- often with of. Israel doth not know, my people doth not consider. Is. i. 3. If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself. John vii. 17. The peas…

The act or state of knowing; clear perception of fact, truth, or duty; certain apprehension; familiar cognizance; cognition. Knowledge, which is the highest degree of the speculative faculties, consists in the perception of the truth of affirmative or negative propositions. Locke.

A gliding, slipping, or gradual falling; an unobserved or imperceptible progress or passing away,; -- restricted usually to immaterial things, or to figurative uses. The lapse to indolence is soft and imperceptible. Rambler. Bacon was content to wait the lapse of long centuries for his expected revenue of fame. I. Tayl…

An instrument, devised by Professor Helmholtz, for testing the color perception of the eye, or for comparing different lights, as to their constituent color or their relative whiteness.

The power of perception by vision. My strength faileth me; as for the light of my eyes, it also is gone from me. Ps. xxxviii. 10.