Perhaps I'm not understanding it properly, but sense 1c seems a bit broad to me.
b. into any office, position, or relation; spec. in Law, into the possession of a copyhold estate.
c. to do anything.
2. fig. To allow a matter to enter into any relation to action or thought. a. To consent to the performance, doing, realization, or existence of; to allow, permit, grant.
¶In these senses admit is sometimes followed by of.
II. As the action of an involuntary agent.
3. trans. To be the channel or means of admission to; to afford entrance, let in. Also absol.
4. To have the capacity to allow to enter, to have room for.
5. To allow of the co-existence or presence of; to lie open to, be capable of, or compatible with. a. trans. Obs. or arch.