In General,
Artificial intelligence refers to the field of study that designs and develops machines capable of performing tasks that would require intelligence if performed by a human being.
According to Computer Science,
Artificial intelligence (AI) is a branch of computer science concerned with designing intelligent computer systems that exhibit the characteristics we associate with intelligence in human behavior - understanding, language, learning, reasoning, solving problems, and so on.
It includes areas such as expert systems, robotics, natural language, speech recognition, and neural networks.
According to Psychology,
Artificial intelligence is a sub-field of cognitive science which uses computer systems to develop machines
Or,
AI is a technology that allows computers to solve problems involving imagination, abstract reasoning, and common sense.