The name of a manner of articulation. A tap is made by an extremely brief contact between the active articulator and the passive articulator. In GB an alveolar tap is sometimes used as a variety of /r/. There are some languages which have a tap in contrast to a trill. An example from Spanish, where an alveolar tap contrasts with an alveolar trill: pero peɾo (“but”) vs perro pero (“dog”).

The image below shows the speech pressure waveform and wide-band spectrogram for a voiced alveolar tap.
Click the ear icon to hear an example.