Disoriented means having lost your bearings, or your sense of what is going on. Awake, and not sure where or when.
It describes the state after a blow to the head, a long flight or waking in a strange room. Medicine uses it precisely, and a patient who is disoriented in time and place is showing a specific symptom. British English also says disorientated, with an extra syllable, and both are correct. The verb is disorientate or disorient, and the noun is disorientation.
1adjectivedisorientedHaving lost your sense of direction or of what is happening.
“He woke disoriented and could not find the light.”
From dis + oriented or disorient + ed.
Etymology from Wiktionary, CC BY-SA