from The American Heritage® Dictionary of the English Language, 4th Edition
- auxiliary v. Used to indicate obligation or duty: You ought to work harder than that.
- auxiliary v. Used to indicate advisability or prudence: You ought to wear a raincoat.
- auxiliary v. Used to indicate desirability: You ought to have been there; it was great fun.
- auxiliary v. Used to indicate probability or likelihood: She ought to finish by next week.
- pro. Variant of aught1.
- n. Variant of aught2.
- v. Obsolete A past participle of owe.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of aught. cipher, zero, nought.
- v. Simple past of owe.
- v. Indicating duty or obligation.
- v. Indicating advisability or prudence.
- v. Indicating desirability.
- v. Indicating likelihood or probability.
- pro. Alternative spelling of aught. anything
- adv. Alternative spelling of aught. at all, to any degree.
- n. A statement of what ought to be the case as contrasted to what is the case.
from the GNU version of the Collaborative International Dictionary of English
- n. See aught.
- Was or were under obligation to pay; owed.
- Owned; possessed.
- To be bound in duty or by moral obligation.
- To be necessary, fit, becoming, or expedient; to behoove; -- in this sense formerly sometimes used impersonally or without a subject expressed.
from The Century Dictionary and Cyclopedia
- Same as aught. Compare naught, nought.
- Owned; the preterit of the verb owe, to possess, own. See owe.
- Owed; the preterit and past participle of the verb owe, to be indebted or obliged.
- To be held or bound in duty or moral obligation.
- To be fit or expedient in a moral view; be a natural or expected consequence, result, effect, etc.
- To be necessary or advisable; behoove.
- To befit: used impersonally.
- = Syn. 3-5. Ought, Should. Ought is the stronger, expressing especially obligations of duty, with some weaker use in expressing interest or necessity: as, you ought to know, if any one does. Should sometimes expresses duty: as, we should be careful of others' feelings; but generally expresses propriety, expediency, etc.: as, we should dot our i's and cross our t's.
- n. Possession: same as aught.
- n. Nought; a cipher.
Middle English oughten, to be obliged to, from oughte, owned, from Old English āhte, past tense of āgan, to possess.(American Heritage® Dictionary of the English Language, Fourth Edition)
Old English āhte, past tense of āgan ("own, possess") (Wiktionary)