Definitions
1.nounThe one or single occasion; the present reason or purpose (now only in for the nonce)."That will do for the nonce, but we'll need a better answer for the long term."
2.nounA nonce word."I had thought that the term was a nonce, but it seems as if it's been picked up by other authors."
3.nounA value constructed so as to be unique to a particular message in a stream, in order to prevent replay attacks.
4.noun(prisons) A sex offender, especially one who is guilty of sexual offences against children."1989 "assorted nonces, ponces and murderers, 'the worst men in the world' [...] on the nonce wing, where the child-killers, molesters and various perverts have to be protected from the other prisoners." (New Statesman, New Society, Volume 2, Statesman & Nation Publishing Company Limited)"
5.noun(prisons) A police informer, one who betrays a criminal enterprise
6.nounA stupid or worthless person."Shut it, ya nonce!"