noun

• (US, informal) A duplicate or copy of a document, particularly one created by a spirit duplicator.
  "Please run off twenty-four dittos of this assignment, for my students."
• (by extension) A copy; an imitation.
  ""You've got to look good to feel good," she announces, a ditto of television slogans."
• (historical, in the plural) A suit of clothes of the same color throughout.
• (education, uncommon) Synonym of worksheet (“a sheet of paper or computerized document”).

verb

• (transitive) To repeat the aforesaid, the earlier action etc.
  "The Communists believed that Prakasam, the Prime Minister, never tried to check the bureaucracy but dittoed every action of the corrupt officials and police."
• (US) To make a copy using a ditto machine.
  "But they were all purple, Dittoed—worn, torn, stained with coffee."