Dictionary

1ought

verbal auxiliary \ˈt\

Definition of OUGHT

—used to express obligation <ought to pay our debts>, advisability <ought to take care of yourself>, natural expectation <ought to be here by now>, or logical consequence <the result ought to be infinity>
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Origin of OUGHT

Middle English oughte (1st & 3d singular present indicative), from oughte, 1st & 3d singular past indicative & subjunctive of owen to own, owe — more at owe
First Known Use: 12th century

2ought

verb \ˈ()t\

—used to indicate what is expected

—used to say or suggest what should be done

Full Definition of OUGHT

transitive verb
1
chiefly Scottish :  possess
2
chiefly Scottish :  owe

Origin of OUGHT

Middle English oughte, 1st & 3d singular past indicative of owen
First Known Use: 13th century

3ought

noun \ˈt\

Definition of OUGHT

:  moral obligation :  duty

First Known Use of OUGHT

1678

4ought

\ˈt, ˈät\

Definition of OUGHT

archaic variant of aught
OUGHT Defined for Kids

ought

helping verb \ˈt\

Definition of OUGHT for Kids

1
—used to show duty <You ought to obey your parents.>
2
—used to show what it would be wise to do <You ought to take care of that cough.>
3
—used to show what is naturally expected <They ought to be here by now.>
4
—used to show what is correct <You ought to get nine for the answer.>

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