big tent n.
A group, especially a political coalition, that accommodates people who have a wide range of beliefs, principles, or backgrounds: “ [Lyndon] Johnson's... efforts to bring businessman and laborer, black and white, city dweller and dirt farmer into his big tent... seemed to mark him as a smoother” (Time).
  bigʹ-tentʹ (bĭgʹtĕntʹ) adj.

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Universalium. 2010.