Adhesion is the tendency of certain dissimilar molecules to cling together.
Adhesion may also refer to:
- Adhesion (medicine), a fibrous band that forms between tissues and organs
- Cell adhesion, the binding of a cell to another cell or to a surface or matrix
- Focal adhesion, a type of macromolecular assembly in cell biology
- Interthalamic adhesion, a band connecting the brain's two thalami
- Adhesion barrier