nonce

/nɒns/[nɒn(t)s][nɑn(t)s]

noun

1
The 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
A 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
A value constructed so as to be unique to a particular message in a stream, in order to prevent replay attacks.

1
One-off; produced or created for a single occasion or use. Denoting something occurring once.

1
(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)”
2
(prisons) A police informer, one who betrays a criminal enterprise
3
A stupid or worthless person.
“Shut it, ya nonce!”

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