Tonga \Ton"ga\, n. [Hind. t[=a]ng[=a], Skr. tama[.n]gaka.] A kind of light two-wheeled vehicle, usually for four persons, drawn by ponies or bullocks. [India]
Source: Webster's Revised Unabridged Dictionary (1913)
Tonga \Ton"ga\, n. (Med.) A drug useful in neuralgia, derived from a Fijian plant supposed to be of the aroid genus Epipremnum.