Brains; a person's ability to think.
A collection of cell bodies and (usually) dendritic connections, in contrast to white matter.
Literal brains as a general substance.
Capacity of mind, especially to understand principles, truths, facts or meanings, acquire knowledge, and apply it to practice; the ability to comprehend and learn.
The quality of making use or having made use of such capacities: depth of understanding, mental quickness.
Information, often secret, about an enemy or about hostile activities.
A political or military department, agency or unit designed to gather information, usually secret, about the enemy or about hostile activities.
An entity that has such capacities.