Definition from Wiktionary, the free dictionary
Jump to: navigation, search


Wikipedia has an article on:


The copper-bottom hull of the Cutty Sark


From the copper sheathing applied to the bottom of a wooden ship to prevent damage from marine organisms. In literal sense 18th century, in figurative sense attested since at least 1807.[1]


copper-bottomed ‎(comparative more copper-bottomed, superlative most copper-bottomed)

  1. Having lower parts made of or covered by copper (especially of a ship or cookware).
  2. (Britain, idiomatic) Thoroughly reliable.
    • 1807, Washington Irving, Salmagundi:[1]
      The copper-bottomed angel at Messrs. Paff’s in Broadway.

Usage notes[edit]

Related term copperfasten used with similar meaning, but different nuance – copper-bottomed means “reliable, trustworthy”, while copper-fastened means “secured, unambiguous”.[1]

Related terms[edit]

See also[edit]


  1. 1.0 1.1 1.2 Copper-bottomed”, The Phrase Finder, Gary Martin.