The term Metaphysical poets was coined by the critic Samuel Johnson to describe a loose group of 17th-century English poets whose work was characterised by the inventive use of conceits, and by a greater emphasis on the spoken rather than lyrical quality of their verse. These poets were not formally affiliated and few were highly regarded until 20th century attention established their importance.

An extended metaphor, also known as a conceit or sustained metaphor, is the use of a single metaphor or analogy at length in a work of literature. It differs from a mere metaphor in its length, and in having more than one single point of contact between the object described and the comparison used to describe it. These implications are repeatedly emphasized, discovered, rediscovered, and progressed in new ways.