(~s)
1.
A ~ is a period of the year when universities and colleges are officially closed. Vac is an abbreviation for ‘~ation’. (BRIT INFORMAL)
..the summer ~.
N-COUNT: usu sing
2.
A ~ is an electric machine which sucks up dust and dirt from carpets. Vac is an abbreviation for ‘~uum cleaner’. (INFORMAL)
N-COUNT