NONCE
Etymology 1
Noun
nonce (plural nonces)
The one or single occasion; the present reason or purpose (now only in for the nonce).
(lexicography) A nonce word.
(cryptography) A value constructed so as to be unique to a particular message in a stream, in order to prevent replay attacks.
Adjective
nonce (not comparable)
One-off; produced or created for a single occasion or use. Denoting something occurring once.
Etymology 2
Noun
nonce (plural nonces)
(British, slang, pejorative, prisons) A sex offender, especially one who is guilty of sexual offences against children. [1975]
(British, slang, pejorative) A stupid or worthless person. [2002]
Source: Wiktionary
Nonce, n. Etym: [For the nonce, OE. for the nones, a corruption of
for then ones, where n. in then is a relic of AS. m in , dat. of the
article and demonstrative pronoun, E. the. See For, Once, and The.]
Definition: The one or single occasion; the present call or purpose; --
chiefly used in the phrase for the nonce.
The miller was a stout carl for the nones. Chaucer.
And that he calls for drink, I 'll have prepared him A chalice for
the nonce. Shak.
Nonce word, "a word apparently employed only for the nonce". Murray
(New English Dict. ).
Source: Webster’s Unabridged Dictionary 1913 Edition