top hat

See also: top-hat and tophat

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Noun

top hat (plural top hats)

  1. A man's formal hat, with a tall cylindrical crown (often of silk).
  2. (construction) A kind of steel batten.
    • 1958 April, “Diesel Railbus for British Railways”, in Railway Magazine, page 276:
      The car body is a light steel shell fabricated by welding from top-hat, channel, and Z sections.

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