v.intr.
1. (usu. foll. by to) (of a substance) stick fast to a surface, another substance, etc.
2 (foll. by to) behave according to; follow in detail (adhered to our plan).
3 (foll. by to) give support or allegiance.
Etymology: F adh{eacute}rer or L adhaerere (as AD-, haerere haes- stick)