need not

Verb

 * 1)  do not have to, do not need to.
 * 2)  Ought not to.
 * 1)  Ought not to.

Usage notes
In one sense used to show that something is not necessary, indicating non-obligation or non-inevitability. In another sense used to indicate that something should not be done because it is futile. Can be used in either sense without inflectional change for singular and plural subjects alike.

Synonyms

 * have to