upflow /ˈʌpfləʊ/noun 1/ʌpˈfləʊ/ verb 1forms 3 noun1 •A flowing upward. upflow /ʌpˈfləʊ/ verb1 •(no longer used) To flow or stream upwards.No eye beheld the spring Of that up-flowing Flame — 1801 formsupflowed · upflowing · upflows