What is an adjectival phrase?

The term adjectival phrase is typically used interchangeably with adjective phrase. It is a group of words that acts as an adjective in a sentence to modify a noun or pronoun.

Some sources differentiate the two terms, though. In those sources, adjective phrases are those that are headed by an adjective (e.g., “the long, dark, winding road”), while adjectival phrases are those that act as an adjective but don’t contain an adjective. Adjectival phrases are often in the form of prepositional phrases (e.g., “the boy with the blue lunchbox”) or participial phrases (e.g., “the woman standing over there”).