Looking for an adjective collocating with 'experience'...

[Mehrgan]

Hi all,

May I have an adjective describing an experience or a moment which is unique and will NEVER be repeated again?

 

[Matthew Wai]

You may consider "one-off", see http://www.thefreedictionary.com/one-off

Not a teacher.

 

[SoothingDave]

"Once in a lifetime"

 

[tzfujimino]

Hello.:-D
I'd prefer it to be hyphenated if it's an adjective - once-in-a-lifetime.