So, in this case, are you equating 'tank' with Main Battle Tank then? Because I consider tank to be broader than MBT as a definition, which would include the Bradley, but the Bradley definitely isn't an MBT.
Tank shouldn't just cover vehicles which are designed primarily to take out other tanks, because that excludes many WWII tanks, including the original Sherman and Matildas designed for infantry support, as well as pretty much every light tank designed for scouting. The Bradley as an APC tank would basically be a continuation of the infantry tank concept, but bringing infantry protection to a greater level.