Wikipedia: Originally, they define "Religism" as a synonym of "Religious Intolerance." However, it has been changed so that as of 2018-OCT, it is defined as:

"... the tendency to believe in religious ideologies as opposed to rational facts." ₁

This is a meaning totally different from our original proposal.  

1. "Any attitude, action or institutional structure that systematically treats an individual or group of individuals differently because of their religion."
2. "The belief that persons who follow one religion are inherently superior to those of other religions." ₂
    

Urban Dictionary: Religism:

"The practice of disliking anyone that is not a member of your religion. Same definition as racism or sexism but with religion."

" 'He's a religist. Anyone who hates people of a religion other than your own is practicing religism'." ₃
 

Ask.com: Their service Reference.com once defined Religism as a synonym for religious discrimination:

"... valuing or treating a person or group differently because of what they do or do not believe." ₄
 

AllExperts: Religism: Encyclopedia:

"Religism refers to beliefs, practices, and institutions that discriminate against people based on their perceived or ascribed 'religion'. Primarily, it refers to an assumption that the religious beliefs of a person, or the absence of such beliefs, can or should determine the way such a person is to be treated in societal and/or private life."

"Some use the word 'religism' more narrowly to refer to a system of oppression, as in institutional religism; a nexus of religist beliefs, whether explicit, tacit or unconscious; practices; organizations and institutions that combine to discriminate against and socially marginalize a group of people who are 'non-believers'."

"Religism can be defined as any distinction, exclusion, restriction or preference based on religion which has the purpose or effect of nullifying or impairing the recognition, enjoyment or exercise, on an equal footing, of human rights and fundamental freedoms in the political, economic, social, cultural or any other field of public and private life."

All religions, including atheism, distinguish between 'believers' and 'non-believers'; they however differ in the extent to which they prescribe discriminatory behavior. ₅
 

Freebase:

"Religism refers to beliefs, practices, and institutions that discriminate against people based on their perceived or ascribed 'religion'. Primarily, it refers to an assumption that the religious beliefs of a person, or the absence of such beliefs, can or should determine the way such a person is to be treated in societal and/or private life." ₆
 

Encyclopaedic Dictionary of Religion:

This is a book by Ramesh Chopra that copied part of this website's Glossary of Spiritual and Religious Terms verbatim, without acknowledging either the source or author. The first sentence's use of "we" reads very strangely in a book that was written by a single author. The reference to genocide refers to a stated desire by a fundamentalist teleminister to have the government execute Wiccans, and to a plea by a fundamentalist pastor in Texas to have the U.S. Army round up and napalm Wiccans.

"Religism: A word that we have created that is non-existent but badly needed in the English language: any attitude, action or institutional structure which systematically treats and individual or group of individuals differently because of their religion. The most common form of religism in North America is in the form of discrimination against non-Christians, up to and including the promotion of genocide against them. However, it also surfaces often a discrimination against conservative Christians. A secondary meaning is the belief that persons who follow one religion are inherently superior to those of other religions." ₇
 

WikiAnswers: In answer to the question: "What is the word for religious discrimination?" they posted two answers.

• The first stated that "I don't think there is one. ... It's odd, because religious discrimination is probably much more common than any other kind: certainly it has caused more wars than anything else. I suppose that religions have their own words for describing their *own* discrimination, though. In Christianity, these would be words such as "heretic", "pagan", "heathen" and so forth. ..."
  
  
• The second answer is a quote from this website's glossary's entry under Religism. ₈
   

HighBeam™ Research once reported on "The week's best invented words" in the Toronto Star newspaper, but does so no longer. Included was:

"Religism, n: The expression of hatred towards, or discrimination against, persons of a specific religion, usually a minority faith." ₉
 

Globe-Guardian.com is an exception. They have a totally different definition for "religism," They define it as: any religion that is without merit; i.e. phony religion or pseudo religion:

"Religism (ri-líj-iz-em) noun:

1.  system of professed theological beliefs that doesn't quite qualify as a bona fide religion, yet seems nearly plausible

2. large group of loosely organized individuals abnormally devoted to an object or concept which appears to be without exceptional merit to the general populace." ₁₀