Definition of lemma noun from the Oxford Advanced American Dictionary

     

    lemma

     noun
    noun
    NAmE//ˈlɛmə//
     
    (pl. lemmas or lemmata
    NAmE//ˈlɛmət̮ə//
     
    )
     
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  1. 1(technology) a statement that is assumed to be true in order to test the truth of another statement
  2. 2 (linguistics) the basic form of a word, for example the singular form of a noun or the infinitive form of a verb, as it is shown at the beginning of a dictionary entry
See the Oxford Advanced Learner's Dictionary entry: lemma