greenbacks
Preserved but no longer current.
The paper money issued in the United States during the war. The term was at first applied only to the notes for small amounts, which were backed with green, but eventually the one word represented all descriptions of what is now known in America as "currency."
Era: ca. 1874 (Victorian)
Sources & notes
Historical definition reproduced from Hotten’s The Slang Dictionary (1874, public domain; Project Gutenberg #42108, retrieved 2026-07-31). Reflects the attitudes of its era.
Common questions
What does “greenbacks” mean?
The paper money issued in the United States during the war. The term was at first applied only to the notes for small amounts, which were backed with green, but eventually the one word represented all descriptions of what is now known in America as "currency."
Is “greenbacks” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.