The concept of being most collinear refers to a set of points, lines, or objects that lie along the same straight line. Its antonym, therefore, would refer to a set of points that are not aligned along a straight line, or that are at an angle to each other. The antonyms for most collinear could be words like skewed, scattered, unaligned, or non-parallel. A set of points that are scattered do not follow a straight line and are positioned in different directions. Similarly, a set of points that are non-parallel do not follow lines that have identical slopes and do not intersect at a single point. Therefore, these words represent a clear opposite of the meaning of most collinear.