hair-splittingEnglishOxford Dictionary of Englishhair-splitting /ˈhɛːˌsplɪtɪŋ / ▸ adjective characterized by or fond of small and overfine distinctions: the legal experts have a particularly hair-splitting mentality. ▸ noun [mass noun] the action of making small and overfine distinctions; quibbling. – DERIVATIVES hair-splitter /ˈhɛːˌsplɪtə / noun