[syn: attachment, adherence, adhesion]
The Collaborative International Dictionary of English v.0.48:
Adhesion \Ad*he"sion\, n. [L. adhaesio, fr. adhaerere: cf. F.
   adh['e]sion.]
   1. The action of sticking; the state of being attached;
      intimate union; as, the adhesion of glue, or of parts
      united by growth, cement, or the like.
      [1913 Webster]
   2. Adherence; steady or firm attachment; fidelity; as,
      adhesion to error, adhesion to a policy.
      [1913 Webster]
            His adhesion to the Tories was bounded by his
            approbation of their foreign policy.  --De Quincey.
      [1913 Webster]
   3. Agreement to adhere; concurrence; assent.
      [1913 Webster]
            To that treaty Spain and England gave in their
            adhesion.                             --Macaulay.
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   4. (Physics) The molecular attraction exerted between bodies
      in contact. See Cohesion.
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   5. (Med.) The process of uniting surfaces by the formation of
      new fibrous bands resulting from an inflammatory process.
      [AS]
   6. (Med.) One of the fibrous bands resulting from
      adhesion[5].
      [AS]
   7. (Bot.) The union of parts which are separate in other
      plants, or in younger states of the same plant.
      [1913 Webster]
   Syn: Adherence; union. See Adherence.
        [1913 Webster]
WordNet (r) 3.0 (2006):
adhesion
    n 1: abnormal union of bodily tissues; most common in the
         abdomen
    2: a fibrous band of scar tissue that binds together normally
       separate anatomical structures
    3: the property of sticking together (as of glue and wood) or
       the joining of surfaces of different composition; "the mutual
       adhesiveness of cells"; "a heated hydraulic press was
       required for adhesion" [syn: adhesiveness, adhesion,
       adherence, bond]
    4: faithful support for a cause or political party or religion;
       "attachment to a formal agenda"; "adherence to a fat-free
       diet"; "the adhesion of Seville was decisive" [syn:
       attachment, adherence, adhesion]