The word "Dalek" has been put into the "Oxford English Dictionary" and other major dictionaries; the "Collins Dictionary" defines it rather broadly as "any of a set of fictional robot-like creations that are aggressive, mobile, and produce rasping staccato speech". Although there is no meaning to their name, "Dalek" sounds like the Norwegian word "dårlig", which means "bad" or "evil". It is also a trademark, having first been registered by the BBC in 1964 to protect its range of Dalek merchandise.