In geometry, describing points or objects that lie on the same straight line.
From Latin prefix 'co-' (together) + 'linearis' (from 'linea' meaning 'line'), meaning literally 'together on a line,' used in mathematics since at least the 18th century.
When three points are colinear, it means you could draw one perfectly straight line through all of them—this simple concept is crucial in everything from computer graphics to navigation systems!
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