lemmatize

[lem-uh-tahyz]
verb (used with object), lem·ma·tized, lem·ma·tiz·ing.
  1. to sort (the words in a list or text) in order to determine the headword, under which other words are then listed.
Also especially British, lem·ma·tise.

Origin of lemmatize

1965–70; < Greek lēmmat- (stem of lêmma; see lemma1) + -ize
Related formslem·ma·ti·za·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for lemmatize

lemmatize

lemmatise

verb
  1. (tr) linguistics to group together the inflected forms of (a word) for analysis as a single item
Derived Formslemmatization or lemmatisation, noun
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