In a manner that involves or maintains collinearity; along the same line.
Adverbial form of 'collinear,' from Latin 'col-' (with) and 'linearis' (relating to lines). The '-ly' suffix converts adjectives to adverbs describing how something happens.
Mathematicians use this word to describe vectors or forces that point in exactly the same direction—they could be different strengths but they're perfectly aligned, like cars in a perfectly straight lane.
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