(1):

(a.) Consisting of root words combined but not materially altered as to form or meaning; as, agglutinate forms, languages, etc. See Agglutination, 2.

(2):

(a.) United with glue or as with glue; cemented together.

(3):

(v. t.) To unite, or cause to adhere, as with glue or other viscous substance; to unite by causing an adhesion of substances.