Definition of: adhesion

(ad·hē′zhən) noun
1. The act of adhering; the state of being attached; adherence.
2. Assent; concurrence.
3. Close connection, as of ideas.
4. Physics The binding force exerted by molecules of unlike substances when brought in contact, as wood and glue.
5. The union of normally separate tissues in the body by proliferating fibrous tissue. See synonyms under ATTACHMENT. [<F adhésion <L adhaesio, -onis <adhaerere. See ADHERE.]