rubber band
From Longman Dictionary of Contemporary Englishrubber bandˌrubber ˈband noun [countable] DHHa thin circular piece of rubber used for fastening things together SYN elastic band British EnglishExamples from the Corpusrubber band• Ask a student to hold a rubber band taut between her hands.• Place a rubber band over your first and second fingers and hold your right hand facing downwards.• I tallied our money, sorted it, found a sickly rubber band in the glove compartment to wrap around it.• Use the rubber band to keep the plastic firmly in place.