any state of mind differing from the normal state of consciousness of a person, esp. one induced by drugs, hypnosis, or mental disorder
An altered state of mind is any condition which is significantly different from a normative waking beta wave.
The euphemism of losing “situational awareness” could be an evasive way of describing just this altered state.
"You are Robert Darcy's wife," he said slowly, trying to adjust his ideas to this altered state of affairs.
For many hours I remained brooding over the altered state of my affairs, with no thought arising to cheer me.
There are some advantages from this altered state of things.
It was not long, however, before signs of an altered state of things presented themselves to view.
By the next day's post I wrote to her about the altered state of the relations between us.
Meanwhile the various foreign powers concerned prepared to make what profit they could out of the altered state of England.
And so it might have been but that the Court could not bring itself to accept the altered state of things.
The altered state of feelings at Yedo began soon to be reflected at Firando.
They were so proud of it that they presented us with photographs of the monument in its altered state.