| a prefix meaning “not,” freely used as an English formative, usually with a simple negative force as implying mere negation or absence of something (rather than the opposite or reverse of it, as often expressed by un-1 ): nonadherence; noninterference; nonpayment; nonprofessional. |

| non- pref. Not: noncombatant. [Middle English, from Old French, from Latin nōn, not; see ne in Indo-European roots.] |
non- pref.
Not: noninvasive.