a. [ad. L. tonānt-em, pr. pple. of tonāre to thunder, make a loud noise.] Thundering, loud-sounding.
1891. G. Meredith, Reading of Life (1901), 122. Nay, nor so tonant thunders the stress of the gale in the oak-trees. Ibid. (1898), Napoleon, xiii. The penetrant, the tonant, tower of towers, Striking from black disaster starry showers.
