Faith is defined as "belief that does not rest on logical proof..."

Proof is defined as "anything serving as such evidence."

--->Faith is belief that does not rest on logical evidence. 

Evidence is defined as "a thing or things helpful in forming a conclusion."

--->Faith is belief that does not rest on a logical conclusion.

Conclusion is defined as "the result or outcome of an act or process."

--->Faith is belief that does not involve a logical process.

Process is defined as "a series of actions, changes, or functions bringing about a result."

--->Faith is belief that does not involve a logical result.

Result is defined as "to come about as a consequence."

--->Faith is belief that does not come about as a consequence.

Consequence is defined as "something that logically or naturally follows from an action or condition."

--->Faith is belief that does not involve logic.

Logic is defined as "a system of reasoning."

--->Faith is belief that does not involve reasoning.

Reason is defines as "an underlying fact or cause that provides logical sense for a premise or occurrence."

--->Faith is belief that does not involve fact.

Fact is defined as "knowledge or information based on real occurrences."

--->Faith is belief without knowledge.

Ignorance is defined as "the condition of being uneducated, unaware, or uninformed."

Educate is defines as "to provide with knowledge or training in a particular area or for a particular purpose."

Belief is defined as "mental acceptance of and conviction in the truth, actuality, or validity of something"

Therefore, faith is conviction in the validity of ignorance.

Reference: http://dictionary.reference.com/help/ahd4.html