Updated February 21, 2017 | Factmonster Staff
  1. Enclose words or passages in quoted matter to indicate insertion of material written by someone other than the author: A tough but nervous, tenacious but restless race [the Yankees]; materially ambitious, yet prone to introspection. …—Samuel Eliot Morison
  2. Enclose material inserted within matter already in parentheses: (Vancouver [B.C.] January 1, 19—).

See also: Parentheses and Brackets.

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