Definition of "louse" in English

noun

1. A small parasitic wingless insect of the order Psocodea.

2. (colloquial, dated, not usually used in plural form) A contemptible person; one who is deceitful or causes harm.

   • It's then that those louses go back to their spouses. Diamonds are a girl's best friend.

verb

1. To remove lice from; to delouse.