Adhesion is the tendency of certain dissimilar molecules to cling together.

Adhesion may also refer to:

Biology 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

Other Rail adhesion, a type of railway Adhesion contract, in law Adhesion (Politics)

See also Adhesive Cohesion (disambiguation)