thong
US /θɑːŋ/
UK /θɑːŋ/
1.
a strip of material, especially leather or hide, used as a fastener or for lashing
:
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He used a leather thong to tie the bundle.
•
The sandals had a simple thong design.
2.
a very narrow strip of material passing between the buttocks and attached to a waistband, worn as underwear or as part of a bikini
:
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She wore a black lace thong under her dress.
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Many swimsuits now feature a thong bottom.