Immaterial
Part of speech: adjective
Definition: Having no matter or substance. Irrelevant.
Example sentence: Our economy's growth functions by inciting us to produce more and more with each passing year. In turn, we require cultural forms to enable us to sort through the glut, and our rituals are once again directed towards the immaterial, towards quality and not quantity.
Irrelevant
Part of speech: adjective
Definition: not related, not applicable, unimportant, not connected
Example sentence: I would love to continue in music, with writing... but I am not the kind of person who will hang around if I start to become irrelevant. If that happens, I will bow down gracefully, raise my kids, and have a garden. And I am going to let my hair go gray when I am older. I don't need to be blonde when I'm 60!