From Longman Dictionary of Contemporary Englishteetotaltee‧to‧tal /ˌtiːˈtəʊtl◂ $ -ˈtoʊ-/ adjective DRINKsomeone who is teetotal never drinks alcohol —teetotalism noun [uncountable]
Examples from the Corpus
teetotal• Originally the working men's clubs were strictly teetotal and it wasn't until 1860 that beer was allowed on the premises.• I do not know if he was teetotal, but my guess would be that he was.• Other than that, he stayed teetotal for the rest of the week.• He's teetotal, or very nearly.• Jack had always been teetotal, since he was convinced that if he ever touched alcohol, he would become dependent. 