proportionally UK /pɹəˈpɔːʃənəli/US /pɹəˈpɔɹʃənəli/ adverb1 •In proportion; in due degree; adapted relatively.The will of those who never allow their will to be disputed, unless they happen to be in a good humour, when they relax proportionally, is almost always unreasonable. — 1791 formsmore proportionally · most proportionally