Common meaning:

A theoretical lens that looks at the overlapping effects of discrimination, like racism, sexism, classism, etc., that are experienced by individuals in marginalized groups.

Hidden meaning of the Equity religion: 

The only perspective you are allowed to view things by is through layers of oppression.

Discussion:

According to the religion of Equity, the only perspective you are allowed to use to view the world is one of intersectionality. The West is to be seen as layers of various oppressions and nothing else.

Equity divides people by things like weight, gender, hair color, health, skin color, ethnic group, eye color, language, religion, hand preference, etc. It then uses intersectionality to keep track of all these characteristics and rate their level of importance. 

No other way of seeing people is allowed and this includes viewing them as human. The only way to have value is to belong to some of these victim categories.

The ultimate purpose of intersectionality is to join all of the groups that hate Western values together in order to create a strong political movement that will have the power to destroy the West.

All hail Intersectionality!