add. ·noun a large sum of money.
2. plunk ·add. ·noun act or sound of plunking.
3. plunk ·add. ·vi to play truant, or "hooky".
4. plunk ·add. ·noun a dollar.
5. plunk ·add. ·vt to be a truant from (school).
6. plunk ·add. ·vi to drop or sink down suddenly or heavily; to plump.
7. plunk ·add. ·vt to pluck and release quickly (a musical string); to twang.
8. plunk ·add. ·vt to throw, push, drive heavily, plumply, or suddenly; as, to plunk down a dollar; also, to hit or strike.
9. plunk ·add. ·vi to make a quick, hollow, metallic, or harsh sound, as by pulling hard on a taut string and quickly releasing it; of a raven, to croak.