unregistered

Definitions

Not recorded in an official list, register, or public record.

Not having been entered or enrolled in a formal system or database.

Examples

The police pulled over the driver for operating an unregistered vehicle on the highway.

The software will not function properly if you attempt to use it with an unregistered license key.

Synonyms

unrecorded unlisted anonymous unindexed unofficial unlogged unfiled

Antonyms

registered recorded listed official documented cataloged enrolled