1. The quality or state of being collinear; the condition in which three or more points lie on the same straight line.
Usage: mathematics; plural form of collinearity
2. In statistics and regression analysis, the problem of high correlation between predictor variables, which can distort model estimates.
Usage: statistics; also called multicollinearity when involving multiple variables

Examples

• The collinearities of the three points A, B, and C were verified by checking that they all satisfied the same linear equation.
• In geometry, students learn to test for collinearities using the slope formula.
• The regression model suffered from collinearities between income and education level.
• Detecting collinearities in the data helped the analyst identify redundant variables.
• The presence of collinearities can inflate standard errors and make coefficient estimates unreliable.