- Used to indicate obligation or duty: You ought to work harder than that.
- Used to indicate advisability or prudence: You ought to wear a raincoat.
- Used to indicate desirability: You ought to have been there; it was great fun.
- Used to indicate probability or likelihood: She ought to finish by next week.
- Variant of aught1.
- Variant of aught2.
- Obsolete A past participle of owe.