Intuition is the ability to acquire knowledge, without recourse to conscious reasoning or needing an explanation. Different fields use the word "intuition" in very different ways, including but not limited to: direct access to unconscious knowledge; unconscious cognition; gut feelings; inner sensing; inner insight to unconscious pattern-recognition; and the ability to understand something instinctively, without any need for conscious reasoning. Intuitive knowledge tends to be approximate.

The word intuition comes from the Latin verb intueri translated as "consider" or from the late middle English word intuit, "to contemplate". Use of intuition is sometimes referred to as responding to a "gut feeling" or "trusting your gut".