Only If (Adverb)
Meaning
Never except when; "call me only if your cold gets worse".
Examples
- Take your umbrella only if it's actually raining.
- Only if it's a medical emergency, go to the emergency room without calling ahead.
- Leave me a message only if it's really urgent and can't wait.
- Book the tickets only if they have an option to reschedule without penalties.
- Buy me another ticket only if someone in your party needs a replacement.