1 N-COUNT [usually singular] (大学的)假期,寒暑假 A vac is a period of the year when universities and colleges are officially closed. Vac is an abbreviation for 'vacation'. (大学的)假期,寒暑假 [British, informal]
2 N-COUNT 真空吸尘器 A vac is an electric machine which sucks up dust and dirt from carpets. Vac is an abbreviation for 'vacuum cleaner'. 真空吸尘器 [informal]
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