alarmingly,adv.|əˈlɑːmɪŋlɪ| [f.prec. + -ly2.] In an alarming manner; so as to excite alarm or apprehension. 1787Burns Lett. 60 Wks. 1875, 349 Alarmingly ill of a sore throat.1856Froude Hist.Eng. I. 8 So far from increasing, manufactures had alarmingly declined.