Tonguing \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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Tongue \Tongue\, v. t. [imp. & p. p. Tongued; p. pr. & vb. n. Tonguing.]

1. To speak; to utter. ``Such stuff as madmen tongue.'' --Shak.

2. To chide; to scold.

How might she tongue me. --Shak.

3. (Mus.) To modulate or modify with the tongue, as notes, in playing the flute and some other wind instruments.

4. To join means of a tongue and grove; as, to tongue boards together.

Source: Webster's Revised Unabridged Dictionary (1913)