Originally a reptile inhabiting fire; later, an anthropomorphous immortal, but still a pyrophile. Salamanders are now believed to be extinct, the last one of which we have an account having been seen in Carcassonne by the Abbe Belloc, who exorcised it with a bucket of holy water.
Any one of numerous species of Urodela, belonging to Salamandra, Amblystoma, Plethodon, and various allied genera, especially those that are more or less terrestrial in their habits.
See the FAQ for the difference between newts and salamanders. Basically, a salamander, as I use the term here, is a newt and/or a salamander.