thong /θɒŋ $ θɒːŋ/ BrE AmE noun [countable]
[ Language: Old English ; Origin: thwong ]
1 . a long thin piece of leather used to fasten something or as part of a whip
2 . [usually plural] American English a type of shoe that covers the bottom of your foot, with a ↑ strap that goes between your toes to hold it on your foot as you walk SYN flip-flops
3 . a piece of underwear or the bottom half of a ↑ bikini that has a single string instead of the back part