bone·less \ˈbonlə̇s\adjective Etymology: Middle English banles, from Old English bānlēas, from bān bone + -lēas -less — more at bone 1.: being without a bone < jellyfish are boneless > : having the bone or bones removed < boneless roasts of beef > 2.: lacking character, strength, or vigor < the sentences are occasionally boneless — J.N.Hall >