key plate

noun

Definition of key plate

  1. 1 :  the part of a stove top in which the lids are placed

  2. 2 :  a protective usually metal plate surrounding a keyhole

  3. 3 :  a plate that prints the central design on a bicolor postage stamp — compare duty plate

  4. 4 :  one of a set of color-printing plates that contains greater detail than the others and that is often the black plate

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