register as

register as (something)

1. To enter one's name into an official record as having some particular status. I registered as a democrat when I first started voting, but I'm thinking of switching my registration to a libertarian. Because of the conviction, he will be forced to register as a sex offender for the next 10 years.
2. To enter someone's name into an official record as having some particular status. Often used in passive constructions. In this usage, a noun or pronoun is used between "register" and "as." We'll first have to register you as a patient before we can begin any treatments. She's registered as a director in the company.
See also: register

register someone as something

to record someone's name on a list of a category of people. I will register you as an independent voter. I am registered as a qualified financial advisor.
See also: register
References in classic literature ?
There are, no doubt, authenticated instances of gentlemen having given up ladies and ladies having given up gentlemen to meritorious rivals, under circumstances of great high-mindedness; but is it quite established that the majority of such ladies and gentlemen have not made a virtue of necessity, and nobly resigned what was beyond their reach; as a private soldier might register a vow never to accept the order of the Garter, or a poor curate of great piety and learning, but of no family--save a very large family of children--might renounce a bishopric?