of no effect—(predic.) useless; unsuccessful (also: of no avail):
- Such an authorization, if given, was of no effect since it would be contrary to statute and regulation.
to no effect—(also: to no avail)
1. unsuccessfully; in vain:
- Senators in the past have called for similar changes but to no effect.
2. = of no effect:
- There were no call buttons for patients and her repeated shouting for a nurse was to no effect.