revolving-door

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.
a.
a company, institution, or organization with a high turnover of personnel or members.
b.
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:
1905–10

revolving-door, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
revolving door
 
n
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
2.  a.  informal a tendency to change personnel on a frequent basis
 b.  (as modifier): a revolving-door band
3.  a.  informal the hiring of former government employees by private companies with which they had dealings when they worked for the government
 b.  (as modifier): revolving-door consultancies

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