Intelligence is a multifaceted concept that's difficult to define comprehensively, but it generally refers to the ability to learn from experience, understand and adapt to new situations, solve problems, and use knowledge to manipulate one’s environment. Here are several facets of intelligence:

Learning and Adaptation

Reasoning & Problem Solving

Memory & Knowledge

Perception

Emotional Intelligence

Creativity

It's important to note that intelligence is still a topic of debate among psychologists and neuroscientists. Traditionally, intelligence was often measured using IQ (intelligence quotient) tests, but many experts now believe that IQ tests capture only a narrow slice of what constitutes human intelligence. Moreover, various cultures might emphasize different abilities or qualities when defining or valuing intelligence, so the concept can be both culturally and contextually relative.