In the most general sense: the mind (including the functions of feeling and volition as well as intellect).

Mind, thought, will. Also: heart, feeling. Obsolete.

The seat of consciousness or thought, the mind: sometimes connoting one of its functions, as memory or attention. Obsolete.

The action or faculty of understanding; way of understanding (something); the notion one has of anything. Also, the mind or mental faculties…

A person's cognitive, rational, or intellectual powers; the intellect; esp. as distinguished from the emotions, and frequently opposed to heart (cf…

Mind, or an act of the mind; understanding; the mental faculties generally; frame of mind, will, spirit; perception, judgement; what is in the mind…

Mind, intellect, mental faculties; mental tendency, disposition.

A person's mind, the brain as the organ of thought. humorous.

slang (chiefly British). The head; the brain, the mind. Cf. brain-box, n. 1.