[ lem-uh-tahyz ]
/ ˈlɛm əˌtaɪz /

verb (used with object), lem·ma·tized, lem·ma·tiz·ing.

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 forms

lem·ma·ti·za·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for lemmatize



/ (ˈlɛməˌtaɪz) /


(tr) linguistics to group together the inflected forms of (a word) for analysis as a single item

Derived Forms

lemmatization 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