1 A2 ニュートラル
一人でいるときに、ほかの人ではなく自分に向けて声に出して話すこと。
"She caught herself talking to herself while trying to solve the maths problem."
“
To be, or not to be, that is the question.
— William Shakespeare, Hamlet, Act 3 Scene 1 (Hamlet's soliloquy — canonical example of a character talking to himself)