Definitions of reckoner
  1. noun
    an expert at calculation (or at operating calculating machines)
    synonyms: calculator, computer, estimator, figurer
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    a person who adds numbers
    number cruncher
    someone able to perform complex and lengthy calculations
    actuary, statistician
    someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums)
    a person who subtracts numbers
    someone who conducts a statistical survey
    type of:
    a person with special knowledge or ability who performs skillfully
  2. noun
    a handbook of tables used to facilitate computation
    synonyms: ready reckoner
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    type of:
    enchiridion, handbook, vade mecum
    a concise reference book providing specific information about a subject or location
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