Goliath Syllabification: (Go·li·ath)Pronunciation: /gəˈlīəTH/Definition of Goliath (in the Bible) a Philistine giant, according to legend slain by David (1 Sam. 17), but according to another tradition slain by Elhanan (2 Sam. 21:19). Goliath in other Oxford dictionaries Definition of Goliath in the British & World English dictionary