Intelligence

1. (chiefly uncountable) The 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 ability to process sentient experience to generate true beliefs with a justified degree of confidence.
2. (chiefly uncountable) The quality of making use or having made use of such capacities: depth of understanding, mental quickness.
3. (countable) An entity that has such capacities.
4. (chiefly uncountable) Information, often secret, about an enemy or about hostile activities.
5. (countable) A political or military department, agency or unit designed to gather information, usually secret, about the enemy or about hostile activities.
6. (dated) Acquaintance; intercourse; familiarity.