\Tongu"ing\, vb. n. (Music)
Modification of tone for a rapid staccato effect by the
performer's tongue, in playing a wind instrument, as a flute.
In {single tonguing} only one kind of stroke is used, the
tongue articulating a rapid ``t;'' in {double tonguing}, two
strokes, as for ``t'' and ``k,'' are alternated; in {triple
tonguing}, ``t, k, t,'' etc.