failing which

Definitions

If that does not happen or is not done.

Otherwise; in the event that the previously mentioned condition is not met.

Examples

You must submit your application by Friday, failing which your request will be automatically rejected.

Please return the borrowed equipment by noon, failing which a late fee will be applied to your account.

Synonyms

otherwise if not or else in default of which failing that

Antonyms

provided that on condition that if so in which case assuming that