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Noun: colour line
Usage: Brit, Cdn (US: color line)
  1. Barrier preventing blacks from participating in various activities with whites
    "The colour line in sports was finally broken in the mid-20th century"; "The colour line in sports was finally broken in the mid-20th century";
    - color bar [US], colour bar [Brit, Cdn], color line [US], Jim Crow

Derived forms: colour lines

Type of: ideological barrier