Εννοια

1. brain (control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action)
2. brain (seat of thought and reason, the ability to think, comprehend, understand)
3. mastermind (person responsible for the highest level of planning and execution of a major operation)
4. used to assess someone's mental capacity, knowledge, and intelligence