Finny

adj, noun, slang

adj, noun, slang ·Moderate ·College level

Definitions

Noun
  1. 1
    A five-pound (£5) note; the sum of five pounds. UK, slang

    "I passed a good many in drapers’ shops, also at tailors’ shops. I never tried jewellers, they’re reckoned too good judges. The notes were all finnies, (5l. notes), and a good imitation."

Adjective
  1. 1
    Having one or more fins.

    "The silent fisher […] waits the finny prize (Book XII)"

  2. 2
    Resembling a fin.
  3. 3
    Abounding in fishes.

    "1730–1774, Oliver Goldsmith, Introductory to Switzerland Cheerful at morn, he wakes from short repose, Breathes the keen air, and carols as he goes; With patient angle trolls the finny deep, Or drives his venturous ploughshare to the steep;"

Synonyms

All synonyms
finfiver

Example

More examples

"The silent fisher […] waits the finny prize (Book XII)"

Etymology

From fin + -y.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.