The property of being cleanly, or habitually clean; good hygiene(noun)
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Use "cleanliness" in a sentence
"Her temper is beyond imagination, her avarice monstrous, her madness about what she calls cleanliness, to a degree of distraction; if I had not first, and then made your brother Ned interpose in form, she would once or twice a week have the very closet washed in which your brother sleeps after dinner."
"That “cleanliness is next to Godliness”, OCD thing, you know."
"But what these students lack in cleanliness they make up for in charm, right?"