Tap, n. [Cf. F. tape. See Tap to strike.] 1. A gentle or slight blow; a light rap; a pat. Addison.
2. A piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel.
3. pl.(Mil.) 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. Wilhelm.