wit

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The natural ability to perceive and understand; intelligence.
• noun Practical intelligence; shrewdness or resourcefulness.
• noun Sound mental faculties; sanity.
• noun The ability to express oneself intelligently in a playful or humorous manner, often in overturning audience expectations.
• noun A person noted for this ability, especially in conversation.
• noun Intelligent playfulness or humor in expression, as in speech, writing, or art.
• noun A person of exceptional intelligence.
• idiom (at (one's) wits' end) At the limit of one's mental resources; utterly at a loss.
• idiom (have/keep) To remain alert or calm, especially in a crisis.
• intransitive verb To be or become aware of; learn.
• intransitive verb To know.
• idiom (to wit) That is to say; namely.

from The Century Dictionary.

• To know; be or become aware: used with or without an object, the object when present often being a clause or statement.
• Preterit tense: I, etc., wist (erroneously wotted).
• Infinitive: wit (to wit); hence, to do to wit, to cause (one) to know.
• [The phrase to wit is now used chiefly to call attention to some particular, or as introductory to a detailed statement of what has been just before mentioned generally, and is equivalent to ‘namely,’ ‘that is to say’: as, there were three present—to wit, Mr. Brown. Mr. Green, and Mr. Black.
• Present participle: witting, sometimes weeting (erroneously wotting). Compare unwitting.
• Past participle: wist.
• To play the wit; be witty: with an indefinite it.
• noun One who has discernment, reason, or judgment; a person of acute perception; especially, one who detects between associated ideas the finer resemblances or contrasts which give pleasure or enjoyment to the mind, and who gives expression to these for the entertainment of others; often, a person who has a keen perception of the incongruous or ludicrous, and uses it for the amusement and frequently at the expense of others.
• See wite.
• noun Knowledge; wisdom; intelligence; sagacity; judgment; sense.
• noun Mind; understanding; intellect; reason; in the plural, the faculties or powers of the mind or intellect; senses: as, to be out of one's wits; he has all his wits about him.
• noun Knowledge; information.
• noun Ingenuity; skill.
• noun Imagination; the imaginative faculty.
• noun The keen perception and apt expression of those connections between ideas which awaken pleasure and especially amusement. See the quotations and the synonyms.
• noun Conceit; idea; thought; design; scheme; plan.
• noun =Syn.6. Wit, Humor. In writers down to the time of Pope wit generally meant the serious kind of wit.
• noun In more recent use wit in the singular generally implies comic wit; in that sense it is different from humor. One principal difference is that wit always lies in some form of words, while humor may be expressed by manner, as a smile, a grimace, an attitude. Underlying this is the fact, consistent with the original meaning of the words, that humor goes more deeply into the nature of the thought, while wit catches pleasing but occult or farfetched resemblances between things really unlike: a good pun shows wit; Iiving's “History of New York” is a piece of sustained humor, the humor lying in the portrayal of character, the nature of the incidents, etc. Again, “Wit may, I think, be regarded as a purely intellectual process, while humor is a sense of the ridiculous controlled by feeling, and coexistent often with the gentlest and deepest pathos” (H. Reed, Lects. on Eng. Lit., xi. 357). Hence humor is always kind, while wit may be unkind in the extreme: Swift's “Travels of Gulliver” is much too severe a satire to be called a work of humor. It is essential to the effect of wit that the form in which it is expressed should be brief; humor may be heightened in its effect by expansion into full forms of statement, description, etc Wit more often than humor depends upon passing circumstances for its effect.

from the GNU version of the Collaborative International Dictionary of English.

• verb To know; to learn.
• noun Mind; intellect; understanding; sense.
• noun A mental faculty, or power of the mind; -- used in this sense chiefly in the plural, and in certain phrases.
• noun Felicitous association of objects not usually connected, so as to produce a pleasant surprise; also. the power of readily combining objects in such a manner.
• noun A person of eminent sense or knowledge; a man of genius, fancy, or humor; one distinguished for bright or amusing sayings, for repartee, and the like.
• noun the five senses; also, sometimes, the five qualities or faculties, common wit, imagination, fantasy, estimation, and memory.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• preposition Alternative spelling of with.
• verb transitive, intransitive Know, be aware of (construed with of when used intransitively).
• noun Sanity.
• noun The senses.
• noun Intellectual ability; faculty of thinking, reasoning.
• noun The ability to think quickly; mental cleverness, especially under short time constraints.
• noun Intelligence; common sense.
• noun Spoken humour, especially when clever or quick.
• noun A person who tells funny anecdotes or jokes; someone witty.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
• noun a witty amusing person who makes jokes
• noun mental ability