If something such as a siren or radio blares or if you blare it, it makes a loud, unpleasant noise. The fire engines were just pulling up, sirens blaring I blared my horn. Blare is also a noun. the blare of a radio through a thin wall. Blare out means the same as blare. Music blares out from every cafe. giant loudspeakers which blare out patriotic music and the speeches of their leader. to make a very loud unpleasant noise (Perhaps from an unrecorded blAran)