courtesy title

courtesy-title的词性：
n.（名词）

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.
名义称号，礼貌尊称：无法律效力，由习惯上给予的称号，如给大学教师的学术上的称号professor

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.
爵号：大不列颠居高位的贵族的继承人习惯上用的称号，包括有与这个贵族一致的次称号

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