Lemmatization

In natural language processing, Lemmatization is the operation of grouping together the inflected forms of a word so they can be analyzed as a single item, identified by the word’s lemma, or dictionary form.

Example: In English, run, runs, ran and running are different forms of run, the lemma by which all four terms are indexed.

Check the basics of NLP with NLTK to program Lemmatization in Python.

More on Lemmatization on Wikipedia.

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