admittancePronunciation: /ədˈmɪt(ə)ns/Translate admittance | into French | into German | into Italian | into Spanish Definition of admittance noun [mass noun] 1the process or fact of entering or being allowed to enter a place or institution:people were unable to gain admittance to the hall 2 Physics a measure of electrical conduction, numerically equal to the reciprocal of the impedance. admittance in other Oxford dictionaries Definition of admittance in the US English dictionary