clean ‧ li ‧ ness /ˈklenlinəs, ˈklenlinɪs/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ cleaner , ↑ cleaning , ↑ cleanliness , ↑ clean , ↑ cleanser ; verb : ↑ clean , ↑ cleanse ; adverb : ↑ clean , ↑ cleanly ; adjective : ↑ clean ≠ ↑ unclean ]
[ Date: 1400-1500 ; Origin: cleanly 'pure, clean' (11-21 centuries) , from Old English clænlic , from clæne ; ⇨ ↑ clean 1 ]
the practice of keeping yourself or the things around you clean:
a high standard of cleanliness