int. and sb. An imitation of the sound of a horn, or some similar sound. (Cf. TRA-LA-LA.)
1849. trans. De la M. Fouqué’s Sir Elidoc, 23. Hark, forward! hark, forward! Tra-ra, tra-ra!
1900. Westm. Gaz., 18 Jan., 4/2. It sounds as if a million kettle-drums were being played—a constant tra-ra-ra-ra, with the boom of the big guns.
