Definition of pitch block in US English:

pitch block

noun

  • In metalworking: a block with a slightly yielding surface made from a mixture including pitch, on which metal objects are placed during engraving or embossing.

Origin

Late 19th century; earliest use found in Edward H. Knight (1824–1883), patent lawyer and expert in mechanics. From pitch + block.

Pronunciation

pitch block

/ˈpɪtʃ blɒk/