What is the meaning of Ought?

simple past of owe

Indicating duty or obligation.

Indicating advisability or prudence.

Indicating desirability.

Indicating likelihood or probability.

Alternative spelling of aught; anything

Alternative spelling of aught; at all, to any degree.

A statement of what ought to be the case as contrasted with what is the case.

Alternative spelling of aught; cipher, zero, nought.

anything, everything

something

Source: wiktionary.org