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) …
Hoffman, Robert R., Dietrich, Eric
The Third International Workshop on Human and Machine Cognition was held in Seaside, Florida, on 13-15 May 1993. Each paper session included presentations on cognitive research, educational research, AI theory and logic, and particular knowledge engineering projects. This mixture encouraged the participants from diverse disciplines to listen and respond to one another. These international workshops are held to allow leading scientists, scholars, and practitioners to discuss current issues and research in particular topics in AI and cognitive science.
Dietrich, Eric, Downes, Stephen
The Second International Workshop on Human and Machine Cognition was held on 9-11 May 1991. Participation was limited to 40 researchers who are principally involved in computer science, philosophy, and psychology. The workshop focused on the foundational and methodological concerns of those who want to forge a robust and scientifically respectable AI and cognitive science. The debate between the traditional AI and the situated cognition types and the connnectionists was a focal point for discussion during the workshop.