revolving door

noun
  1. an entrance door for excluding drafts from the interior of a building, usually consisting of four rigid leaves set in the form of a cross and rotating about a central, vertical pivot in the doorway.
  2. Informal.
    1. a company, institution, or organization with a high turnover of personnel or members.
    2. a legal, medical, or other system or agency that discharges criminals, patients, etc., in the shortest possible time and without adequate attention or consideration.

Origin of revolving door

First recorded in 1905–10
Related formsre·volv·ing-door, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for revolving-door

revolving door

noun
  1. a door that rotates about a central vertical axis, esp one with four leaves arranged at right angles to each other, thereby excluding draughts
    1. informala tendency to change personnel on a frequent basis
    2. (as modifier)a revolving-door band
    1. informalthe hiring of former government employees by private companies with which they had dealings when they worked for the government
    2. (as modifier)revolving-door consultancies
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