'Seeker' definitions:

Definition of 'seeker'

noun

Someone making a search or inquiry; "they are seekers after truth" [syn: seeker, searcher, quester]

noun

A missile equipped with a device that is attracted toward some kind of emission (heat or light or sound or radio waves)

From: GCIDE

Seeker \Seek"er\, n.
1. One who seeks; that which is used in seeking or searching. [1913 Webster]
2. (Eccl.) One of a small heterogeneous sect of the 17th century, in Great Britain, who professed to be seeking the true church, ministry, and sacraments. [1913 Webster]
A skeptic [is] ever seeking and never finds, like our new upstart sect of Seekers. --Bullokar. [1913 Webster]