1. A title of no legal validity that is assumed or granted by custom, such as the academic title professor given to any instructor at a college.
2. In Great Britain, the title that the heir of a high-ranking peer customarily uses, consisting of a secondary title accorded to the peer.
3. In Great Britain, the prefixes Lord and Lady added to the given names of the younger children of dukes and marquises or the Honourable added to the children of viscounts and barons.
爵号：在大不列颠，指加在公爵和侯爵的较小的孩子的名之前的前缀Lord 和 Lady 或指加在子爵和男爵的孩子名前的前缀 the Honourable