[ rek-uh-ner ]
See synonyms for reckoner on
  1. a person who reckons.

  2. Also called ready reckoner. a collection of mathematical and other tables for ready calculation.

Origin of reckoner

Middle English word dating back to 1175–1225; see origin at reckon, -er1

Words Nearby reckoner Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use reckoner in a sentence

  • William Sutcliffe on his return said that Sammy's three notes were pinned in a ready reckoner.

  • Having been pinned in the ready reckoner, it would show the marks of pin-holes.

  • Sometime during the night the quill of the dead reckoner had traced its fine red line over the 30th meridian.

    The Syndic | C.M. Kornbluth
  • True, all turns on your Ready-reckoner being moderately correct,—being not insupportably incorrect!

    Past and Present | Thomas Carlyle
  • He becomes an astoundingly quick and accurate reckoner without other aid than a moment's reflection.

    The Life of the Fly | J. Henri Fabre

British Dictionary definitions for reckoner


/ (ˈrɛkənə) /

  1. any of various devices or tables used to facilitate reckoning, esp a ready reckoner

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012