Definition of deviller in US English:

deviller

(also deviler)

noun

  • 1A worker who operates any of various machines called a devil to break up or open cotton or wool offcuts, to tear old rags to pieces, etc. Now historical.

  • 2Any of various types of machine used to break up or open cotton or wool offcuts, to tear old rags to pieces, etc.

  • 3Originally Law slang. A person employed to carry out research or other professional work for someone else, especially a lawyer or author.

Origin

Mid 19th century; earliest use found in Champion & Weekly Herald. From devil + -er.