historical An officer responsible for the supervision and regular inspection of a forest. Compare "regard".
2A person who or thing which regards someone or something.
Early 16th century; earliest use found in Charter of London. From regard + -er, originally after Anglo-Norman regardour, regardor, regardeor, Anglo-Norman and Middle French regardeur (French regardeur) inspector, controller (both 1170 in Anglo-Norman), spectator, forest officer, and post-classical Latin regardor, reguardor forest officer, regardator forest officer (frequently from 1160 in British sources).