How is the term “Anglo-conformity” defined, history homework help

Here is a link to an article: “US Immigrants and the Dilemma of Anglo-conformity.”  It argues that although paradigms of assimilation, acculturation, Anglo-conformity, cultural pluralism, and the melting pot all are evident, historically the overriding force in the cultural reality of the United States is Anglo-conformity. 

http://sdonline.org/48/us-immigrants-and-the-dilemma-of-anglo-conformity/ (Links to an external site.)

How is the term “Anglo-conformity” defined?  Does it involve race, class, ethnicity or religion?  And how does it relate to the new wave of immigrants entering America during this period (1880-1924)?

About 2 to 3 paragraphs is good