1. (v. i.) To stick fast or cleave, as tape adheres to paper; to become joined or united; as, wax to the finger; the lungs sometimes adhere to the pleura.

2. (v. i.) To hold, be attached, or devoted; to remain fixed, either by personal union or conformity of faith, principle, or opinion; as, men adhere to a party, a cause, a leader, a church.

3. (v. i.) To be consistent or coherent; to be in accordance; to agree.