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a. Imperceptible; inappreciable: an insensible change in temperature.
b. Very small or gradual: insensible movement.
a. Having lost consciousness, especially temporarily; unconscious: lay insensible where he had fallen.
b. Not invested with sensation; inanimate: insensible clay.
c. Devoid of physical sensation or the power to react, as to pain or cold; numb.
a. Unaware; unmindful: I am not insensible of your concern.
b. Not emotionally responsive; indifferent: insensible to criticism.
4. Lacking meaning; unintelligible.
[Middle English, from Old French, from Latin īnsēnsibilis, imperceivable : in-, not; see in-1 + sēnsibilis, perceptible; see sensible.]
in·sen′si·bil′i·ty, in·sen′si·ble·ness n.