Chapter Otter to Out of O by Webster's Dictionary (1913 Edition)

Ought
(Ought) n. & adv. See Aught.

Ought
(Ought), imp., p. p., or auxiliary. [Orig. the preterit of the verb to owe. OE. oughte, aughte, ahte, AS. ahte. &radic110. See Owe.]

1. Was or were under obligation to pay; owed. [Obs.]

This due obedience which they ought to the king.

Tyndale.

The love and duty I long have ought you.

Spelman.

[He] said . . . you ought him a thousand pound.

Shak.

2. Owned; possessed. [Obs.]

The knight the which that castle ought.

Spenser.

3. To be bound in duty or by moral obligation.

We then that are strong ought to bear the infirmities of the weak.

Rom. xv. 1.

4. To be necessary, fit, becoming, or expedient; to behoove; — in this sense formerly sometimes used impersonally or without a subject expressed. "Well ought us work." Chaucer.

To speak of this as it ought, would ask a volume.

Milton.

Ought not Christ to have suffered these things?

Luke xxiv. 26.

Ought is now chiefly employed as an auxiliary verb, expressing fitness, expediency, propriety, moral obligation, or the like, in the action or state indicated by the principal verb.

Syn. — Ought, Should. Both words imply obligation, but ought is the stronger. Should may imply merely an obligation of propriety, expendiency, etc.; ought denotes an obligation of duty.

Oughtness
(Ought"ness) n. The state of being as a thing ought to be; rightness. [R.] N. W. Taylor.

Oughwhere
(Ough"where`) adv. [AS. ahwær.] Anywhere; somewhere. See Owher. [Obs.]

Ouistiti
(Ouis"ti*ti) n. [F.] (Zoöl.) See Wistit.

Oul
(Oul) n. An awl. [Obs.] Chaucer.

Oul
(Oul), n. An owl. [Obs.] Chaucer.

Oulachan
(Ou"la*chan) n. (Zoöl.) Same as Eulachon.

Ounce
(Ounce) n. [F. once, fr. L. uncia a twelfth, the twelfth part of a pound or of a foot: cf. Gr. bulk, mass, atom. Cf. 2d Inch, Oke.]

1. A weight, the sixteenth part of a pound avoirdupois, and containing 437 grains.

2. (Troy Weight) The twelfth part of a troy pound.

The troy ounce contains twenty pennyweights, each of twenty-four grains, or, in all, 480 grains, and is the twelfth part of the troy pound. The troy ounce is also a weight in apothecaries' weight. [Troy ounce is sometimes written as one word, troyounce.]