hairsplitting Syllabification: (hair·split·ting)Pronunciation: /ˈhe(ə)rˌsplitiNG/Definition of hairsplitting adjective characterized by or fond of small and overfine distinctions:legal experts have a particularly hairsplitting mentality noun the action of making small and overfine distinctions; quibbling. Derivatives hairsplitterPronunciation: /-ˌsplitər/ noun hairsplitting in other Oxford dictionaries Definition of hairsplitting in the British & World English dictionary