Magna Defender was created in 1999.
The Magna Defender is a Ranger in a way because Mike can morph to become the Magna Defender with a morphing device and he also has access to a zord which is capable of transforming for battling purposes.
The Magna Defender was not active following Power Rangers Lost Galaxy since the original Magna Defender was killed off and Mike the second Magna Defender had his powers destroyed as a result of the Torozord blowing up while trying to hold up the portal to allow Terra Venture and the Astro Megaship to escape the Lost Galaxy and remain back to their regular universe however as the "Legendary Battle" episode of Power Rangers Super Megaforce proves the Magna Defender is back in action.
No, Magna Defender himself is not a zord however once he goes inside the Torozord as part of the Defender Torozord transformation then he is technically part of a zord but the Magna Defender would still not be an actual zord himself since his piloting system is just a different system since the Torozord has no cockpit while the Galaxy Rangers do have cockptis while inside their respective Galactazords.
Magna Steyr was created in 2001.
Chirurgia magna was created in 1363.
Mitsubishi Magna was created in 1985.
Magna Curia was created in 1621.
Nematopogon magna was created in 1878.
Magna Publications was created in 1972.
Mastigoteuthis magna was created in 1913.
Magna International was created in 1957.
Fabula Magna was created in 2009.