\Ton\, obs.
pl. of {Toe}. --Chaucer.

\Ton\, n. [Cf. {Tunny}.] (Zo["o]l.)
The common tunny, or house mackerel.

\Ton\, n. [F. See {Tone}.]
The prevailing fashion or mode; vogue; as, things of ton.
--Byron.
      If our people of ton are selfish, at any rate they show
      they are selfish.                        --Thackeray.
{Bon ton}. See in the Vocabulary.

\Ton\, n. [OE. tonne, tunne, a tun, {AS}. tunne a tun, tub,
a large vessel; akin to G. & F. tonne a ton, tun, LL. tunna a
tun; all perhaps of Celtic origin; cf. Ir. & Gael. tunna a
tun. Cf. {Tun},{Tunnel}.] (Com.)
A measure of weight or quantity. Specifically:
(a) The weight of twenty hundredweight.
Note: In England, the ton is 2,240 pounds. In the United
      States the ton is commonly estimated at 2,000 pounds,
      this being sometimes called the short ton, while that
      of 2,240 pounds is called the long ton.
(b) (Naut. & Com.) Forty cubic feet of space, being the unit
    of measurement of the burden, or carrying capacity, of a
    vessel; as a vessel of 300 tons burden. See the Note
    under {Tonnage}.
(c) (Naut. & Com.) A certain weight or quantity of
    merchandise, with reference to transportation as freight;
    as, six hundred weight of ship bread in casks, seven
    hundred weight in bags, eight hundred weight in bulk; ten
    bushels of potatoes; eight sacks, or ten barrels, of
    flour; forty cubic feet of rough, or fifty cubic feet of
    hewn, timber, etc.
Note: Ton and tun have the same etymology, and were formerly
      used interchangeably; but now ton generally designates
      the weight, and tun the cask. See {Tun}.