Webster's Revised Unabridged Dictionary · 1913

Admittance

Admittance ({not transcribed}) , noun

1.
The act of admitting.
2.
Permission to enter; the power or right of entrance; also, actual entrance; reception.
To gain admittance into the house. — South
He desires admittance to the king. — Dryden
To give admittance to a thought of fear. — Shakespeare
3.
Concession; admission; allowance; as, the admittance of an argument. [Obsolete] — Sir T. Browne
4.
Admissibility. [Obsolete] — Shakespeare
5.
(Eng. Law) The act of giving possession of a copyhold estate. — Bouvier

Admittance , noun

(Electricity) The reciprocal of impedance.