Loss of the sense of familiarity with one's surroundings (time, place, and person); loss of one's bearings.
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dis·ori·en·ta·tion (.)dis-.ōr-ē-ən-'tā-shən, -.ȯr-, -.en- n a usu. transient state of confusion esp. as to time, place, or identity often as a result of disease or drugs
dis·ori·en·tate (')dis-'ōr-ē-ən-.tāt, -'ȯr-, -.en- vt, -tat·ed; -tat·ing
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n.
the state produced by loss of awareness of space, time, or personality. It can be the result of drugs, anxiety, or organic disease (such as dementia or Korsakoff's syndrome).
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dis·or·i·en·ta·tion (dis-or″e-ən-taґshən) the loss of proper bearings, or a state of mental confusion as to time, place, or identity.Medical dictionary. 2011.