What are mobile armors?

Mobile armors are non-humanoid vehicles based on mobile
suit technology. In the Universal Century series, these
machines are larger and more powerful than mobile suits, and
their greater size allows them to carry exotic weapons and
gadgetry. Later on, transformable mobile suits are
introduced, which can change into a "mobile armor form"
capable of high-speed flight.

The mobile armor term is also used to describe non-humanoid
vehicles, and transformed mobile suits, in other Gundam
worlds. However, the mobile armors featured in such recent
series as Gundam X and Gundam Seed are often no more
powerful than an average mobile suit - in fact, in the
latter case, the mobile armors used by the Earth forces are
just glorified space fighters which are no match for the
enemy's mobile suits.