Noun

1. The sound of light blow or knock

Verb

1. Cut a female screw thread with a tap
2. Draw from or dip into to get something
3. Strike lightly
4. Draw from; make good use of
5. Tap a telephone or telegraph wire to get information
6. Furnish with a tap or spout, so as to be able to draw liquid from it
7. Make light, repeated taps on a surface
8. Walk with a tapping sound
9. Dance and make rhythmic clicking sounds by means of metal plates nailed to the sole of the dance shoes
10. Draw (liquor) from a tap
11. Pierce in order to draw a liquid from
12. Make a solicitation or entreaty for something; request urgently or persistently