trade marktrade mark: a symbol, most commonly used in conjunction with...: a symbol, most commonly used in conjunction with goods or services, that distinguishes those goods or services as those of a particular trader; trade marks can be words, figures or a combination of these; trade marks can be registered – applications to trademark a name, ie. register a trade marktrade mark: a symbol, most commonly used in conjunction with..., are made to the Intellectual Property Office (for a UK trade marktrade mark: a symbol, most commonly used in conjunction with...) and to the European Union Intellectual Property Office (for an EU trade marktrade mark: a symbol, most commonly used in conjunction with...); or trade makes can be unregistered and the owner of goodwillgoodwill: a business’ intangible and reputational assets s... in an unregistered trade marktrade mark: a symbol, most commonly used in conjunction with... will have certain rights with respect to the mark notwithstanding lack of registration and will be able to sue for passing offpassing off: a civil wrong, or tort, that protects a trader... if certain factual requirements are met.