n. /serr"taks'/ ; v. /serr"taks', serr taks"/ , n.
1. an additional or extra tax on something already taxed.
2. one of a graded series of additional taxes levied on incomes exceeding a certain amount.
v.t.
3. to put an additional or extra tax on; charge with a surtax.
[ 1880-85; SUR- 1 + TAX; cf. SUPERTAX, F surtaxe ]