1
plural lice
ˈlaɪs 
: a type of small insect that lives on the bodies of people or animals
: a type of small insect that lives on the bodies of people or animals
a problem with head lice
2
plural louses, informal
: a bad or cruel person
Her ex-husband is a real louse.
Cite this Entry
“Louse.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/louse. Accessed 16 Apr. 2026.
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