—n.
1 a supporter of a party, person, etc.
2 a devotee of an activity.
—adj.
1 (foll. by to) faithfully observing a rule etc.
2 (often foll. by to) (of a substance) sticking fast.
Derivatives:
adherence n.
Etymology: F adheacuterent (as ADHERE)
Useful english dictionary. 2012.