3.1 Noun Phrase

A noun phrase is a noun or pronoun, which is called the head , and any other dependent words that come before or after the head. These dependent words are either determiners or modifiers, and they give specific information about the head.

Noun phrases name a particular example of something or a whole class of people or things.

Determiner + Noun:        The Greeks had two meanings for it.

Quantifier + Noun:                   Some people don't like it.

Adjective premodifier + Noun:   Young people don't know anything.

Demonstrative determiner + Noun:   These men.

Sources:
http://dictionary.cambridge.org/grammar/british-grammar/noun-phrases-dependent-words
https://learnenglish.britishcouncil.org/en/english-grammar/clause-phrase-and-sentence/noun-phrase