To concede as true; to acknowledge or assent to, as an allegation which it is impossible to deny (+ to).
To allow to enter; to grant entrance (to), whether into a place, into the mind, or into consideration
To give warrant or allowance, to grant opportunity or permission (+ of).
To allow (someone) to enter a profession or to enjoy a privilege; to recognize as qualified for a franchise.
To allow to enter a hospital or similar facility for treatment.
To be capable of; to permit. In this sense, "of" may be used after the verb, or may be omitted.
To admit to the truth, particularly in the context of sins or crimes committed.
To hear or receive such a confession of sins from.
To acknowledge faith in; to profess belief in.
To unburden (oneself) of sins to God or a priest, in order to receive absolution.
To disclose or reveal.