The phrase "different denominations" refers to various groups or branches within a larger religion. It means that these groups have slight differences in their beliefs, practices, or interpretations of the religion. Full definition
And this is not a simple question, which has lead to the myriad of different religions and different denominations of those religions that have existed now or in the past. (religion.blogs.cnn.com)
People also go church - hopping, and switch denominations, or people marry those from different denominations more frequently today than ever before. (redeeminggod.com)
There are so many different interpretations of the bible, and so many different denominations that it seems so incredibly abstract. (religion.blogs.cnn.com)