Noun

1. The trace of a point whose direction of motion changes
2. A line on a graph representing data
3. A pitch of a baseball that is thrown with spin so that its path curves as it approaches the batter
4. The property possessed by the curving of a line or surface
5. Curved segment (of a road or river or railroad track etc.)

Verb

1. Turn sharply; change direction abruptly
2. Extend in curves and turns
3. Form an arch or curve
4. Bend or cause to bend
5. Form a curl, curve, or kink