being or characterized by concepts or their formation; "conceptual discussions"; "the schizophrenic loses ability to abstract or do conceptual thinking"; "sex is a notional category, gender is a grammatical category"
not consisting of matter; "immaterial apparitions"; "ghosts and other immaterial entities"
(often followed by `to') lacking importance; not mattering one way or the other; "whether you choose to do it or not is a matter that is quite immaterial (or indifferent)"; "what others think is altogether indifferent to him"
of no importance or relevance especially to a law case; "an objection that is immaterial after the fact"
compliant and obedient to authority; "editors and journalists who express opinions in print that are opposed to the interests of the rich are dismissed and replaced by subservient ones"-G. B. Shaw
the calculated use of violence (or threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear