Noun revolving door has 2 senses
  1. revolving door - an organization or institution with a high rate of turnover of personnel or membership
    --1 is a kind of
    social group
  2. revolving door, revolver - a door consisting of four orthogonal partitions that rotate about a central pivot; a door designed to equalize the air pressure in tall buildings
    --2 is a kind of door
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