- an incorporeal spirit.
- an issue extraneous to the debate.
- an objection that is immaterial after the fact.
- ghosts and other immaterial entities.
- immaterial apparitions.
- mentioned several impertinent facts before finally coming to the point.
- the price was immaterial.
- what others think is altogether indifferent to him.
- whether you choose to do it or not is a matter that is quite immaterial (or indifferent).