pentameter Syllabification: (pen·tam·e·ter)Pronunciation: /penˈtamitər/Definition of pentameter noun Prosody a line of verse consisting of five metrical feet, or (in Greek and Latin verse) of two halves each of two feet and a long syllable. Origin: early 16th century: via Latin from Greek pentametros (see penta-, -meter)pentameter in other Oxford dictionaries Definition of pentameter in the British & World English dictionary