irrelevant

adj

1. Not relevant, as

   “His comments were completely irrelevant to the discussion.”

   “We need to focus on the main topic and ignore irrelevant details.”

   “The fact that she is his sister is irrelevant to the case.”

   “Andy Kirby said that, on her second day in his class, Velvet declared algebra irrelevant to her life and strolled out the door. "Haven't seen her since," he said.”

2. Not relevant, as:
3. Not relevant, as:
4. (derogatory, slang)No longer famous or popular; washed up.