If that's the definition that you use, go for it. Personally, I...

If that's the definition that you use, go for it.
Personally, I can't hold strong beliefs unless there is evidence for doing so. Your dictionary doesn't mention evidence.

Here is a definition from Google. I go along with the second definition which mentions proof (I would substitute evidence for proof); the first one doesn't.

faith
feɪθ/
noun

1. 1.
   complete trust or confidence in someone or something.
   "this restores one's faith in politicians"
   

   	Column 1	Column 2
   0	synonyms:	trust, belief, confidence, conviction, credence, reliance, dependence; More

   	Column 1	Column 2
   0

2. 2.
   strong belief in the doctrines of a religion, based on spiritual conviction rather than proof.
   "bereaved people who have shown supreme faith"
   

   	Column 1	Column 2
   0	synonyms:	religion, church, sect, denomination, persuasion, religious persuasion, religious belief, belief, code of belief, ideology, creed, teaching, dogma, doctrine"she gave her life for her faith"