—v.i. 1. to stay attached; stick fast; cleave; cling (usually fol. by to): The mud adhered to his shoes. 2. Physics.(of two or more dissimilar substances) to be united by a molecular force acting in the area of contact.
3. to be devoted in support or allegiance; be attached as a follower or upholder (usually fol. by to): to adhere to a party. 4. to hold closely or firmly (usually fol. by to): to adhere to a plan. 5. Obs.to be consistent.
—v.t. to cause to adhere; make stick: Glue will adhere the tiles to the wallboard.