Like an adjective, an adjectival phrase is a group of words that tells us more about a noun or pronoun. For example: “Meals at fancy restaurants cost too much.”  The adjectival phrase, “at fancy restaurants” tells us more about the noun “meals”.

Adjectival phrases often start with a preposition, for example: The boy with black hair is in Grade 9. The phrase is “with black hair” and the preposition is “with”.