noun
US /naʊn/
UK /naʊn/
1.
a word (other than a pronoun) used to identify any of a class of people, places, or things (common noun), or to name a particular one of these (proper noun)
:
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In the sentence 'The cat sat on the mat,' 'cat' and 'mat' are nouns.
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Proper nouns like 'Paris' and 'Eiffel Tower' are always capitalized.