I guess you have encountered one point in your life that something is bound to happen or something is wrong relayed by your gut feeling? It can be defined at hunch, sixth sense, instincts and insight.

Here is what Intuition means:

The standard definition is "knowledge gained of something without the use of reasoning or the five basic senses". Throughout time, many of the great achievers have spoken of successful decisions they made based on hunches, insights, visions, and gut feelings.