bone of contention UK /ˈbəʊn əv kənˈtɛnʃən/US /ˈboʊn əv kənˈtɛnʃən/ noun1 •Something that continues to be disputed; something on which no agreement can be reached.It is still a bone of contention whether to go ahead with the original plan in light of the new evidence. formsbones of contention