I was reading [this](http://scikit-learn.org/stable/modules/linear_model.html#ridge-regression) when I came across the term collinearity. I tried looking up what it is but top results are related to multicollinearity. 

I could find [here](http://here) about multicollinearity

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> multicollinearity refers to predictors that are correlated with other predictors in the model
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It is my assumption (based on their names) that multicollinearity is a type of collinearity but not sure. Do these 2 terms differ or are they synonyms?