Definition of SYLLABLE
1: a unit of spoken language that is next bigger than a speech sound and consists of one or more vowel sounds alone or of a syllabic consonant alone or of either with one or more consonant sounds preceding or following

2: one or more letters (as syl, la, and ble) in a word (assyl*la*ble) usually set off from the rest of the word by a centered dot or a hyphen and roughly corresponding to the syllables of spoken language and treated as helps to pronunciation or as guides to placing hyphens at the end of a line

3: the smallest conceivable expression or unit of something :jot

Taken from