The inner part, space, or side of something. The inside of the house was much larger than it appeared from the outside.
The internal organs of a person or animal. The doctor examined the patient's insides to diagnose the problem.
The inner nature or character of a person. Despite his tough exterior, he has a gentle inside.
The part of a road or track nearest to the center or the side of the road or track. The car took the inside lane to overtake the slower vehicle.