v. & n.
--v.
1. tr. beat or strike heavily esp. with the fist (threatened to thump me).
2 intr. throb or pulsate strongly (my heart was thumping).
3 intr. (foll. by at, on, etc.) deliver blows, esp. to attract attention (thumped on the door).
4 tr. (often foll. by out) play (a tune on a piano etc.) with a heavy touch.
5 intr. tread heavily.
--n.
1. a heavy blow.
2 the sound of this.
Derivatives:
thumper n.
Etymology: imit.