Artificial intelligence (AI) refers to the simulation of human intelligence in machines that are programmed to think like humans and mimic their actions. The term may also be applied to any machine that exhibits traits associated with a human mind such as learning and problem-solving.

Machine intelligence is popularly known as Artificial Intelligence and is
generally referred to by its abbreviation viz. AI.

1. Artificial Intelligence is the study of making computers smart.
2. Artificial Intelligence is the study of making computer models of human intelligence; and finally
3. Artificial Intelligence is the study concerned with building machines that simulate human
behaviour.
The first one of the above definitions is based on behaviour-oriented approach to A.I.

The second definition is from a psychologists point of view,
where the purpose is to use computer as a tool to understand better the mechanisms of
the human mind.

Definition by Elaine Rich, Artificial Intelligence is the study of how to make computers do things, at which, at the moment, people are better.