A Tap

1. A gentle or slight blow; a light rap; a pat.
2. (dance) Ellipsis of tap dance.
3. (computing, graphical user interface) The act of touching a touch screen.Coordinate term: click
4. A piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel. Synonym: heeltap
5. (military) 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.
6. (phonetics) A consonant sound made by a single muscle contraction, such as the sound [ɾ] in the standard American English pronunciation of body.Synonym: flap