splitting /ˈsplɪtɪŋ/adjective 3noun 3forms 3phrases 2 adjective3 •Resembling the sound of something being split or ripped. •Severely painful.I have a splitting headache. •Very rapid.They moved at a splitting pace. noun3 •An instance where something splits. •A division in the mind, or affecting one's sense of self. •The cleavage of a covalent bond. formssplittings · more splitting · most splitting Phrases with splitting hair-splittingOf or characterized by hair-splitting, seeking or having exceedingly small differences, fine details, and/or edge cases of no seeming importance, concerning or concerned with minutiae. skull-splittingOf a severe headache or migraine.