Noun

(uncountable) Capacity of mind, especially to understand principles, truths, facts or meanings, acquire knowledge, and apply it to practice; the ability to learn and comprehend.

* 1912 , (Edgar Rice Burroughs), (Tarzan of the Apes), Chapter 5

Not so, however, with Tarzan, the man-child. His life amidst the dangers of the jungle had taught him to meet emergencies with self-confidence, and his higher intelligence resulted in a quickness of mental action far beyond the powers of the apes.

* {{quote-magazine, date=2013-07-19, author= Ian Sample

, volume=189, issue=6, page=34, magazine=(The Guardian Weekly) , title= Irregular bedtimes may affect children's brains , passage=Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits.  ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.}}

(countable) An entity that has such capacities.

* Tennyson

The great Intelligences fair / That range above our mortal state, / In circle round the blessed gate, / Received and gave him welcome there.

(uncountable) Information]], usually secret, about the enemy or about hostile [[activity, activities.

(countable) A political or military department, agency or unit designed to gather information, usually secret, about the enemy or about hostile activities.

(dated) Acquaintance; intercourse; familiarity.

* Clarendon

He lived rather in a fair intelligence than any friendship with the favourites.

Noun

(uncountable) The condition of not being threatened, especially physically, psychologically, emotionally, or financially.

* Shakespeare

Give up yourself merely to chance and hazard, / From firm security .

* Jonathan Swift

Some alleged that we should have no security for our trade.

(countable) Something that secures.

An organization or department responsible for providing security by enforcing laws, rules, and regulations as well as maintaining order.

* {{quote-magazine, date=2012-12-14, author=Simon Jenkins, authorlink=Simon Jenkins

, volume=188, issue=2, page=23, date=2012-12-21, magazine=(The Guardian Weekly) , title= We mustn't overreact to North Korea boys' toys , passage=The threat of terrorism to the British lies in the overreaction to it of British governments. Each one in turn clicks up the ratchet of surveillance, intrusion and security . Each one diminishes liberty.}}

* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=52, magazine=(The Economist)

, title= The new masters and commanders , passage=From the ground, Colombo’s port does not look like much. Those entering it are greeted by wire fences, walls dating back to colonial times and security posts. For mariners leaving the port after lonely nights on the high seas, the delights of the B52 Night Club and Stallion Pub lie a stumble away.}}

(legal) Something that secures the fulfillment of an obligation or law.

(legal) Freedom from apprehension.

(finance) Proof of ownership of stocks, bonds or other investment instruments.

(finance) Property etc. temporarily relinquished to guarantee repayment of a loan.

A guarantee.

* Macaulay

Those who lent him money lent it on no security but his bare word.

(obsolete) Carelessness; negligence.

* Shakespeare

He means, my lord, that we are too remiss, / Whilst Bolingbroke, through our security , / Grows strong and great in substance and in power.