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Adjective: jr.
  1. Used of the younger of two persons of the same name especially used to distinguish a son from his father
    "John Smith, Jr";
    - younger, Junior
Noun: Jr
  1. A son who has the same first name as his father
    - Junior, Jnr [Brit]

Derived forms: Jrs

See also: junior

Type of: boy, son

Encyclopedia: Jr