- (politics) Abbreviation of National Party.
- (aviation) Abbreviation of North Atlantic Tracks.
NAT (countable and uncountable, plural NATs)
- (genetics) Initialism of nucleic acid test.
- (networking) Acronym of network address translation (“network address rewriting”).
- Coordinate term: PAT
- (networking) Acronym of network address translator (“device that implements that network function; a NAT firewall”).
- -ant, ANT, Ant, Ant., NTA, TAN, TNA, Tan, a'n't, an't, ant, ant-, ant., tan