splinter /ˈsplɪn.tə/noun 5verb 4forms 3phrases 1 noun5 •A long, sharp fragment of material, often wood. •A small such fragment that gets embedded in the flesh. •A group that formed by splitting off from a larger membership. •A fragment of a component word in a blend. •A double-jump bid which indicates shortage in the bid suit. verb4 •To come apart into long sharp fragments.The tall tree splintered during the storm. •To cause to break apart into long sharp fragments.His third kick splintered the door. •(figurative) To break, or cause to break, into factions.The government splintered when the coalition members could not agree.The unpopular new policies splintered the company. •To fasten or confine with splinters, or splints, as a broken limb.it will be very hard for Me to Splinter up the broken confuséd Pieces of it. — 1659 formssplintered · splintering · splinters Phrases with splinter splinter upTo attach splints to a broken limb in order to allow it to grow together.