'Trier' definitions:

Definition of 'trier'

noun

One (as a judge) who examines and settles a case

noun

One who tries [syn: trier, attempter, essayer]

From: GCIDE

Trier \Tri"er\, n. [From Try.]
1. One who tries; one who makes experiments; one who examines anything by a test or standard. --Boyle. [1913 Webster]
2. One who tries judicially. [1913 Webster]
3. (Law) A person appointed according to law to try challenges of jurors; a trior. --Burrill. [1913 Webster]
4. That which tries or approves; a test. --Shak. [1913 Webster]