Final answer:
Prepositional complement is a noun phrase or an adjective that completes the meaning of a subject or object in a sentence after a preposition.
Step-by-step explanation:
Prepositional complement refers to a noun phrase or an adjective that follows a preposition and completes the meaning of the subject or object in a sentence. It can act as a subject complement, where it follows a linking verb like 'be', or as an object complement, where it follows a transitive verb.
For example, in the sentence 'The taxi driver seemed like a nice man,' the prepositional complement 'like a nice man' completes the meaning of the subject 'the taxi driver.'
Other examples include 'On that day, Francis became a criminal,' where 'a criminal' is the prepositional complement following the linking verb 'became.'