No, I definitely mean the entity in charge of maintaining the register, not the location in which the register is kept.
In domain registration parlance, that is the registry (e.g. Verisign for .com). A registrar is one of the companies which intermediates between the registry and the users who obtain domain registrations (e.g. GoDaddy).
In domain registration parlance, that is the registry (e.g. Verisign for .com). A registrar is one of the companies which intermediates between the registry and the users who obtain domain registrations (e.g. GoDaddy).