noun phrase:

noun phrase [1]: a phrase whose head is a noun. For example, "the black cats in the corner" is a noun phrase whose head is the noun "cats". [Spanish: frase nominal [1]]

noun phrase [2]: a structure that can function in a sentence where noun phrases (in sense 1) typically do, such as the subject or object of a verb, or the object of preposition. In this sense, the category includes proper nouns (names) and pronouns as well as full phrases headed by nouns, but does not include nominal expressions (such as "striped cat") which cannot be used as the subject or object of a sentence (*"Striped cat purred" is not grammatical). Sometimes called a (full) nominal [2], usually abbreviated as NP. [Spanish: frase nominal [2]]