The act of admitting; allowance. More usually,

Permission to enter; the power or right of entrance; and hence, actual entrance; as, he gained admittance into the church.

Concession; admission; allowance; as the admittance of an argument.

Shakespeare uses the word for the custom or prerogative of being admitted; “Sir John, you are a gentleman of excellent breeding, of great admittance’: but the license is unwarrantable.