Definition of cast iron in English:

cast iron

Syllabification: cast i·ron

noun

  • 1A hard, relatively brittle alloy of iron and carbon that can be readily cast in a mold and contains a higher proportion of carbon than steel (typically 2.0-4.3 percent).
    More example sentences
    • It had three keyholes and as many huge keys and was apparently made of cast iron reinforced with steel.
    • There are two other classes of cast iron which are more ductile than gray cast iron.
    • Steel combines something of the strength of wrought iron with the malleability of cast iron.
  • 2 [as modifier] Firm and unchangeable: there are no cast-iron guarantees
    More example sentences
    • But it is reluctant to issue a cast-iron guarantee that every contract will meet its target, even though none has fallen short to date.
    • It combines stock market growth potential with a cast-iron guarantee that savers will not lose a penny if the market volatility continues.
    • In this sense, the individual must again decide in each case, giving a cast-iron definition of where they would draw the line.

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noun
a small amount; a little