[ ad-mit-ns ]
See synonyms for admittance on
  1. permission or right to enter: admittance into the exhibit room.

  2. an act of admitting.

  1. actual entrance.

  2. Electricity. the measure of the ability of a circuit to conduct an alternating current, consisting of two components, conductance and susceptance; the reciprocal of impedance, expressed in mhos. Symbol: Y

Origin of admittance

First recorded in 1535–45; admit + -ance

synonym study For admittance

1. See entrance1.

Other words for admittance

Other words from admittance

  • re·ad·mit·tance, noun

Words Nearby admittance Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use admittance in a sentence

British Dictionary definitions for admittance


/ (ədˈmɪtəns) /

  1. the right or authority to enter

  2. the act of giving entrance

  1. electrical engineering the reciprocal of impedance, usually measured in siemens. It can be expressed as a complex quantity, the real part of which is the conductance and the imaginary part the susceptance: Symbol: y

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for admittance


[ ăd-mĭtns ]

  1. A measure of the ability of a circuit or component to allow current flow when exposed to AC voltages (its AC conductance). It is equal to the reciprocal of the impedance of the circuit, just as conductivity is equal to the reciprocal of resistance, and is similarly measured in mhos.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.