WordNet sense 1 ((of verse) having a metric system based on relative duration of syllables):

WordNet sense 2 ((of verse) having a metric system based on stress rather than syllables or quantity):

WordNet sense 3 (not forming a syllable or the nucleus of a syllable; consisting of a consonant sound accompanied in the same syllable by a vowel sound or consisting of a vowel sound dominated by other vowel sounds in a syllable (as the second vowel in a falling diphthong)):