Pruning is the practice of removing unwanted portions from a plant.
Pruning may also refer to:
- Synaptic pruning, the reformation of neural structure by pruning "excess" neurons or neural clusters
- Decision tree pruning, a method of simplification of a decision tree
- The Pruning (morphology) algorithm, a technique used in digital image processing based on mathematical morphology
- Pruning (viticulture), how pruning is used in vine training systems
- Pruning (vascular), in prenatal development, the disappearance of blood vessels which are no longer needed
- Pruning (microeconomics), the removal of "excess" items from a budget
- Pruning (maceration), in dermatology, the softening, whitening, and wrinkling of skin that is soaked in water
- Retinal vessels pruning, the disappearance of the ends of the small vessels in the area affected (as in case of retinal venous occlusion).