Entry 1 sense Webster, 1913 Cleanliness /(klĕn"lĭ*nĕs)/ · Clean·li·ness · IPA /ˈklɛn.li.nᵻs/ 01 n. State of being cleanly; neatness of person or dress. 1. State of being cleanly; neatness of person or dress. “Cleanliness from head to heel.” — Swift.