Definition of "lookup"

lookup

noun
plural lookups
1. An attempt to retrieve data.
2. The process of locating a term in a reference work.
  Quotations
  For some terms there is no Index entry that approaches the current spelling, making look-up difficult.
  2018, James Lambert, “Setting the Record Straight: An In-depth Examination of Hobson-Jobson”, in International Journal of Lexicography, volume 31, number 4, page 491
verb
1. Misspelling of look up.