involving persons of different religious faiths; as, an interfaith marriage; interfaith good will.

(a.k.a. inter-faith): An attempt to initiate dialog, cooperation, and understanding among individuals of two different faiths. It is also used to refer to a relationship or marriage between people of different faiths. It is occasionally used as a synonym for " multi-faith." Unfortunately, the term "faith" is defined differently by various religious groups. For example, some conservative Protestants regard a marriage to a person who is not of their denomination to be an interfaith marriage. Other conservative Protestants would regard liberal Christians, Roman Catholics, Mormons, etc. as being of a different faith. Still other Christians interpret "interfaith" as involving another religion, as in a Christian-Buddhist exchange.

This term is generally used to describe a marriage between a man and woman who belong to different faith groups. An example of an interfaith marriage is one between a Greek Orthodox Christian and a non-Christian.

involving persons or groups of different religions (as opposed to ecumenical)

Between or involving persons adhering to different religions.

The terms interfaith or interfaith dialogue refer to cooperative and positive interaction between people of different religious traditions, (ie. "faiths") at both the individual and institutional level, leading to tolerance and mutual respect. It is distinct from syncretism or alternative religion, in that dialogue often involves promoting understanding between different religions to increase "tolerance" towards others, rather than to synthesize new beliefs. The history of religion shows that conflict has been more the state of affairs than dialogue.