WordReference Random House Unabridged Dictionary of American English © 2025
se′rial num′ber, 
  1. a number, usually one of a series, assigned for identification:the serial number of an automobile engine.
  • 1895–1900

Collins Concise English Dictionary © HarperCollins Publishers::
serial number
  1. any of the consecutive numbers assigned to machines, tools, books, etc
'serial number' also found in these entries (note: many are not synonyms or translations):
ISSN - International Standard Serial Number - Julian Day - K - accession number - folio - identification tag - ring - ringer

Forum discussions with the word(s) "serial number" in the title:


Look up "serial number" at Merriam-Webster
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