Teacher or preacher, e.g

• Inspiring instructor
• Teacher or instructor
• One who strengthens by moral instruction

Wiktionary Word definitions in Wiktionary
n. 1 A person who edify. 2 (context obsolete English) A builder.

Wikipedia Word definitions in Wikipedia
Edifier is the fifth studio album by Gravitar , released in 2001 by Manifold Records .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Edifier \Ed"i*fi`er\, n. One who builds. [Obs.] One who edifies, builds up, or strengthens another by moral or religious instruction.