(Heb. namer, so called because spotted, Cant 4:8), was that great spotted feline which anciently infested the mountains of Syria, more appropriately called a panther (Felis pardus). Its fierceness (Isaiah 11:6), its watching for its prey (Jeremiah 5:6), its swiftness (Habakkuk 1:8), and the spots of its skin (Jeremiah 13:23), are noticed. This word is used symbolically (Daniel 7:6; Revelation 13:2).
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Leopard'". "Easton's Bible Dictionary".