1 intr. (often foll. by for, to, or to + infin.) make a formal request for something to be done, given, etc. (apply for a job; apply for help to the governors; applied to be sent overseas).
2 intr. have relevance (does not apply in this case).
3 tr. a make use of as relevant or suitable; employ (apply the rules). b operate (apply the handbrake).
4 tr. (often foll. by to) a put or spread on (applied the ointment to the cut). b administer (applied the remedy; applied common sense to the problem).
5 refl. (often foll. by to) devote oneself (applied myself to the task).
Derivatives:
applier n.
Etymology: ME f. OF aplier f. L applicare fold, fasten to
Useful english dictionary. 2012.