If you are looking for an answer to the question What is Artificial Intelligence? and you only have a minute, then here's the definition the Association for the Advancement of Artificial Intelligence offers on its home page: "the scientific understanding of the mechanisms underlying thought and intelligent behavior and their embodiment in machines."
However, if you are fortunate enough to have more than a minute, then please get ready to embark upon an exciting journey exploring AI (but beware, it could last a lifetime) …
Anderson, Michael L., Barkowsky, Thomas, Berry, Pauline, Blank, Douglas, Chklovski, Timothy, Domingos, Pedro, Druzdzel, Marek J., Freksa, Christian, Gersh, John, Hegarty, Mary, Leong, Tze-Yun, Lieberman, Henry, Lowe, Ric, Luperfoy, Susann, Mihalcea, Rada, Meeden, Lisa, Miller, David P., Oates, Tim, Popp, Robert, Shapiro, Daniel, Schurr, Nathan, Singh, Push, Yen, John
The Association for the Advancement of Artificial Intelligence presented its 2005 Spring Symposium Series on Monday through Wednesday, March 21-23, 2005 at Stanford University in Stanford, California. The topics of the eight symposia in this symposium series were (1) AI Technologies for Homeland Security; (2) Challenges to Decision Support in a Changing World; (3) Developmental Robotics; (4) Dialogical Robots: Verbal Interaction with Embodied Agents and Situated Devices; (5) Knowledge Collection from Volunteer Contributors; (6) Metacognition in Computation; (7) Persistent Assistants: Living and Working with AI; and (8) Reasoning with Mental and External Diagrams: Computational Modeling and Spatial Assistance.