From Longman Dictionary of Contemporary Englishpermanent waveˌpermanent ˈwave noun [countable] old-fashioned DCBa perm1
Examples from the Corpus
permanent wave• A Antibiotics in your system can affect a permanent wave, giving poor or no results at all.• The new space has been gradually transformed from a place of permanent wave to culinary rave.• The same narrow, lined face, the same grey eyes, the same grey hair with the same permanent wave. 