Any person who claims to have repeated contact with alien entities. Billy Meir and George Adamski are two of the most famous examples.

An individual who has been or is being contacted by alien beings by either physical or telepathic means.

someone whohas had contact with off-planet beings, especially continuing mentalcontact. The first published contactee was George Adamski. Hedescribed personal meetings he had with aliens that looked much likehumans. They took him aboard their ship and he wrote a detailedaccount of his experiences. Things have changed quite a bit sincethat beginning in the early fifties. Many people tell us that theyhave telepathic communcation with off planet beings or channel them.They have often seen unusual craft, but they have not necessarilybeen taken aboard or met face to face. Nowadays someone like Adamskiwould probably be called an experiencer or a participant if he wentwillingly and an abductee if he didn't. Many spiritual books havebeen published that are attributed to off-planet guides. The languageand concerns can be difficult to distinguish from earlier channeledmaterial.