The Collaborative International Dictionary of English v.0.48:

Ai \A"i\, n.; pl. Ais. [Braz. a["i], ha["i], from the animal's
   cry: cf. F. a["i].] (Zool.)
   The three-toed sloth (Bradypus tridactylus) of South
   America. See Sloth.
   [1913 Webster] Aiblins

WordNet (r) 3.0 (2006):

AI
    n 1: an agency of the United States Army responsible for
         providing timely and relevant and accurate and synchronized
         intelligence to tactical and operational and strategic
         level commanders [syn: Army Intelligence, AI]
    2: the branch of computer science that deal with writing
       computer programs that can solve problems creatively;
       "workers in AI hope to imitate or duplicate intelligence in
       computers and robots" [syn: artificial intelligence, AI]
    3: a sloth that has three long claws on each forefoot and each
       hindfoot [syn: three-toed sloth, ai, Bradypus
       tridactylus]
    4: the introduction of semen into the oviduct or uterus by some
       means other than sexual intercourse [syn: artificial
       insemination, AI]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

AI
       Artificial Intelligence


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

AI
       Adobe Illustrator (Adobe)


The Jargon File (version 4.4.7, 29 Dec 2003):

AI
 /A?I/, n.

    Abbreviation for ?Artificial Intelligence?, so common that the full form is
    almost never written or spoken among hackers.


The Free On-line Dictionary of Computing (30 December 2018):

artificial intelligence
AI

    (AI) The subfield of computer
   science concerned with the concepts and methods of symbolic
   inference by computer and symbolic knowledge representation
   for use in making inferences.  AI can be seen as an attempt to
   model aspects of human thought on computers.  It is also
   sometimes defined as trying to solve by computer any problem
   that a human can solve faster.  The term was coined by
   Stanford Professor John McCarthy, a leading AI researcher.

   Examples of AI problems are computer vision (building a
   system that can understand images as well as a human) and
   natural language processing (building a system that can
   understand and speak a human language as well as a human).
   These may appear to be modular, but all attempts so far (1993)
   to solve them have foundered on the amount of context
   information and "intelligence" they seem to require.

   The term is often used as a selling point, e.g. to describe
   programming that drives the behaviour of computer characters
   in a game.  This is often no more intelligent than "Kill any
   humans you see; keep walking; avoid solid objects; duck if a
   human with a gun can see you".

   See also AI-complete, neats vs. scruffies, neural
   network, genetic programming, fuzzy computing,
   artificial life.

   ACM SIGART (http://sigart.acm.org/).  U Cal Davis
   (http://phobos.cs.ucdavis.edu:8001).  CMU Artificial
   Intelligence Repository
   (http://cs.cmu.edu/Web/Groups/AI/html/repository.html).

   (2002-01-19)


The Free On-line Dictionary of Computing (30 December 2018):

ai

    The country code for Anguilla.

   (1999-01-27)


Easton's 1897 Bible Dictionary:

Ai
   ruins. (1.) One of the royal cities of the Canaanites (Josh.
   10:1; Gen. 12:8; 13:3). It was the scene of Joshua's defeat, and
   afterwards of his victory. It was the second Canaanite city
   taken by Israel (Josh. 7:2-5; 8:1-29). It lay rebuilt and
   inhibited by the Benjamites (Ezra 2:28; Neh. 7:32; 11:31). It
   lay to the east of Bethel, "beside Beth-aven." The spot which is
   most probably the site of this ancient city is Haiyan, 2 miles
   east from Bethel. It lay up the Wady Suweinit, a steep, rugged
   valley, extending from the Jordan valley to Bethel.

     (2.) A city in the Ammonite territory (Jer. 49:3). Some have
   thought that the proper reading of the word is Ar (Isa. 15:1).


Hitchcock's Bible Names Dictionary (late 1800's):

Ai, or Hai, mass; heap


Bouvier's Law Dictionary, Revised 6th Ed (1856):

AIR. That fluid transparent substance which surrounds our globe.
     2. No property can be had in the air it belongs equally to all men,
being indispensable to their existence. To poison or materially to change
the air, to the annoyance of the public, is a nuisance. Cro. Cr. 610; 2 Ld.
Raym 1163; I Burr. 333; 1 Str. 686 Hawk. B. 1, c. 75, s. 10; Dane's Ab.
Index h.t. But this must be understood with this qualification, that no one
has a right to use the air over another man's land, in such a manner as to
be injurious to him. See 4 Campb. 219; Bowy. Mod. Civ. Law, 62; 4 Bouv.
Inst. n. 36 1; Grot. Droit de la Guerre et de la Paix, liv. 2, c. 2, Sec. 3,
note, 3 et 4.
     3. It is the right of the proprietor of an estate to enjoy the light
and air that will come to him, and, in general, no one has a right to
deprive him of them; but sometimes in building, a man opens windows over his
neighbor's ground, and the latter, desirous of building on his own ground,
necessarily stops the windows already built, and deprives the first builder
of light and air; this he has the right to do, unless the windows are
ancient lights, (q.v.) or the proprietor has acquired a right by grant or
prescription to have such windows open. See Crabb on R. P. Sec. 444 to 479
and Plan. Vide Nuisance.