Progressive meter describes metrical patterns that change systematically throughout a poem, evolving in complexity, speed, or structure as the work develops. This technique involves the calculated modification of rhythmic schemes to reflect thematic development, emotional progression, or structural transformation. Progressive meter demonstrates how prosodic change can parallel content, using the evolution of rhythmic patterns to reinforce or embody the poem's trajectory. This approach treats meter as a dynamic rather than static element, showing how formal features can develop alongside themes and emotions.

Progressive meter gradually alters metrical patterns within a poem—such as shifting from iambic to anapestic—to mirror thematic development or emotional change.