vi to strike a gentle blow.
2. tap ·vt to draw, or cause to flow, by piercing.
3. tap ·noun a gentle or slight blow; a light rap; a pat.
4. tap ·noun a hole or pipe through which liquor is drawn.
5. tap ·vt to put a new sole or heel on; as, to tap shoes.
6. tap ·noun a place where liquor is drawn for drinking; a taproom; a bar.
7. tap ·noun a plug or spile for stopping a hole pierced in a cask, or the like; a faucet.
8. tap ·vt to pierce so as to let out, or draw off, a fluid; as, to tap a cask, a tree, a tumor, ·etc.
9. tap ·vt to form an internal screw in (anything) by means of a tool called a tap; as, to tap a nut.
10. tap ·noun liquor drawn through a tap; hence, a certain kind or quality of liquor; as, a liquor of the same tap.
11. tap ·noun a piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel.
12. tap ·noun a tool for forming an internal screw, as in a nut, consisting of a hardened steel male screw grooved longitudinally so as to have cutting edges.
13. tap ·vt to strike with a slight or gentle blow; to touch gently; to rap lightly; to pat; as, to tap one with the hand or a cane.
14. tap ·vt hence, to draw from (anything) in any analogous way; as, to tap telegraph wires for the purpose of intercepting information; to tap the treasury.
15. tap ·noun a signal, by drum or trumpet, for extinguishing all lights in soldiers' quarters and retiring to bed, usually given about a quarter of an hour after tattoo.