elder

n. 年长者, 老人, 前辈
a. 年长的, 资深的
【医】 接骨木[属植物]

名词:eldership 

elder

adj.（形容词）
Greater than another in age or seniority.
年纪较大的：比另一人年长的或资格老的
Superior to another or others, as in rank.
资格较老的，地位较高的：比另一人或另些人地位高的，如在职衔上
n.（名词）
An older person.
年长者
An older, influential member of a family, tribe, or community.
头人，长辈：在一个家庭、部落或团体里的年长且有影响力的人
One of the governing officers of a church, often having pastoral or teaching functions.
长老：教会的管事或领导之一，通常有精神上指导或教育的功能
Mormon Church A member of the higher order of priesthood.
【摩门教】 高级司祭

来源：
Middle English eldre
中古英语 eldre
from Old English eldra * see al- 2
源自 古英语 eldra *参见 al- 2

【引伸】
el.dership.
n.（名词）
Elder and eldest generally apply to persons, unlikeolder and oldest, which also apply to things. Elder andeldest are used principally with reference to seniority:
Elder 和 eldest 通常指人， 不同于older 和 oldest ， 后两者也可指物， Elder 和eldest 主要用来指资格：
例句：
elder sister;
大姐；

例句：
elder statesman;
资格老的议员，

例句：
John the Elder.
老约翰

elder
elder 2

n.（名词）
Any of various shrubs or small trees of the genusSambucus, having clusters of small white flowers and red or purplish-black berrylike fruit.
接骨木：一种接骨木属 的灌木或小树，开大团小白花，结红色或黑紫色类似浆果的果实

来源：
Middle English eldre
中古英语 eldre
from Old English ellôrn
源自 古英语 ellôrn