nit /nɪt/noun 9verb 1forms 4 noun9 •The egg of a louse. •(UK, slang) A fool, a nitwit. •A young louse. •(UK, Ireland) A head louse regardless of its age. •A minor shortcoming; the object of a nitpick. •A candela per square metre.This brightness of this LCD screen is between 900 and 1000 nits. •A nitpicker. •A player with an overly cautious and reactive playing style. •Synonym of nat (“logarithmic unit of information”). verb1 •(slang) To have the modus vivendi of a drug addict, to live the life of a nitty. formsnitted · nitting · nits · NITs