1. The act of admitting or entering: approved the admittance of new students into the college.
2. Permission to enter: a pass that guarantees admittance to the nightclub.
3. Symbol Y Electricity The reciprocal of impedance.
1. permission or right to enter: admittance to the exhibit room.
2. an act of admitting.
3. actual entrance.
4. the measure of the ability of an electrical circuit to conduct an alternating current, consisting of two components, conductance and susceptance; the reciprocal of impedance. Symbol: Y