0 always paying a lot of attention and trying to notice possible dangers, often more than is reasonable:
She told me she's always hypervigilant moving around the city after receiving so many threats.
Neglected children often become hypervigilant, very alert, very aware of everything going on around them.
He admits that he was and is hypervigilant—a state familiar to adoptive parents, he says.
I'm hypervigilant, checking all the windows and doors, making sure no one is following me.
He was drinking too much, and so hypervigilant he carried a pistol wherever he went.
