on no account

Definitions

Under no circumstances; absolutely not.

Not for any reason; prohibited.

Examples

On no account should you open the door to strangers while you are home alone.

The security guard insisted that, on no account, were visitors allowed in the restricted area.

Synonyms

under no circumstances not on any account by no means in no way not at all

Antonyms

by all means at any cost without fail in any case absolutely