Hypercatalectic describes a poetic line that ends with one more syllable than the meter expects, usually an unstressed syllable after the final regular foot. Poets may use this slight extension to soften the line ending, alter the rhythm, or create a feeling of overflow beyond the metrical pattern.
Example
The wind goes home through winter grass tonight
And leaves one soft note hanging in the air.
Related Definitions
[adj] (verse) having an extra syllable or syllables at the end of a metrically complete verse or in a metrical foot