Hold, Sleep, and Disorient (also called Stun) are mezzes. Taunt, Placate, Confuse, Repel, Knockback/Up, Immobilize, NoPhase, Invulnerable (after Teleporting), and Dimension Shift are not if I'm reading the wiki right.
What about the defeated status, when all HP is depleted? Is that its own unique status effect?