1. : a mark or symbol that is worn on the forehead especially in India and denotes the wearer's caste
2. : a distinguishing characteristic or trait that identifies a member of a particular class or group
the caste mark of the intellectual
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1. (in India) a mark, usually on the forehead, symbolizing and identifying caste membership.
2. a distinctive trait, associated with a group or class and marking a person as a member.
[1900-05]
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caste mark,
1. a mark on the forehead indicating the caste to which a Hindu belongs.
2. Figurative. any sign of membership in a class or group: ยป
... the socially disabling caste mark of a colored skin (Harper's).
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n. a symbol on the forehead denoting membership of a particular Hindu caste
Useful english dictionary. 2012.