Spin or spinning most often refers to:
- Spin (physics) or particle spin, a fundamental property of elementary particles
- Spin quantum number, a number which defines the value of a particle's spin
- Spinning (textiles), the creation of yarn or thread by twisting fibers together, traditionally by hand spinning
- Spin (geometry), the rotation of an object around an internal axis
- Spin (propaganda), an intentionally biased portrayal of something
Spin, spinning or spinnin may also refer to: