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.-to put a new sole or heel on; as, to tap shoes.-a gentle or slight blow; a light rap; a pat.-a piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel.-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.-to strike a gentle blow.-a hole or pipe through which liquor is drawn.-a plug or spile for stopping a hole pierced in a cask, or the like; a faucet.-liquor drawn through a tap; hence, a certain kind or quality of liquor; as, a liquor of the same tap.-a place where liquor is drawn for drinking; a taproom; a bar.-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.-to pierce so as to let out, or draw off, a fluid; as, to tap a cask, a tree, a tumor, etc.-hence, to draw from (anything) in any analogous way; as, to tap telegraph wires for the purpose of intercepting information; to tap the treasury.-to draw, or cause to flow, by piercing.-to form an internal screw in (anything) by means of a tool called a tap; as, to tap a nut.