nat

from The Collaborative International Dictionary of English v.0.48

Nat \Nat\ (n[aum]t), adv.
   Not. [Obs.] --Chaucer.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Nat \Nat\ [For ne at.]
   Not at; nor at. [Obs.] --haucer.
   [1913 Webster]

from The Free On-line Dictionary of Computing (8 July 2008)

Network Address Translation
NAT
Network Address Translator

   <networking> (NAT, or Network Address Translator, Virtual LAN)
   A technique in which a {router} or {firewall} rewrites the
   source and/or destination {Internet addresses} in a packet as
   it passes through, typically to allow multiple {hosts} to
   connect to the {Internet} via a single external {IP address}.
   NAT keeps track of outbound connections and distributes
   incoming packets to the correct machine.

   NAT is an alternative to adopting {IPv6} (IPng).  It allows
   the same IP addresses (10.x.x.x is the conventional range) to
   be used on many private local networks while requiring only
   one of the increasingly scarce public addresses to be
   allocated to each private network.

   NAT does not however allow an external service to initiate a
   TCP connection to an internal host, nor does it support
   stateless protocols based on UDP well unless the router
   software has extensions to support each specific protocol.

   (2005-09-18)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

NAT
       [IP] Network Address Translator (RFC 1631, IP)