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) …
Frisch, Alan M., Cohn, Anthony G.
The 1988 Workshop on Principles of Hybrid Reasoning, a one-day AAAI-sponsored workshop, was held in St. Paul, Minnesota on August 21, 1988, in conjunction with the National Conference on Artificial Intelligence. This article reports on the workshop and presents some of our afterthoughts based upon prolonged discussion of the issues that arose during the workshop.
Frisch, Alan M., Scherl, Richard B.