non-

1.
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 .
Origin
prefix representing L adv. nōn not
British Dictionary definitions for non-

non-

prefix
1.
indicating negation: nonexistent
2.
indicating refusal or failure: noncooperation
3.
indicating exclusion from a specified class of persons or things: nonfiction
4.
indicating lack or absence, esp of a quality associated with what is specified: nonobjective, nonevent
Word Origin
from Latin nōn not

nona-

combining form
1.
nine: nonagon
Word Origin
from Latin nōnus
Word Origin and History for non-

prefix meaning "not, lack of," or "sham," 14c., from Anglo-French noun-, from Old French non-, from Latin non "not, by no means, not at all, not a," from Old Latin noenum "not one" (*ne oinom, from PIE *ne "not" + *oi-no-; see one). In some cases perhaps from Middle English non "not" (adj.), from Old English nan (see not).

non- in Medicine

non- pref.
Not: noninvasive.