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.
The knight the which that castle ought.Spenser.
We then that are strong ought to bear the infirmities of the weak.Rom. xv. 1.
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.