Dictionary.net

in a linear manner; "linearly polarized radiation"

in a linear fashion; "it grew linearly"

in a linear manner; "linearly polarized radiation"

in a linear fashion; "it grew linearly"

In a linear manner.

With lines; in bot., applied to very narrow leaves in which the length greatly exceeds the breadth; linear numbers, those numbers which have relation to length only; linear perspective, that which regards only the forms, magnitudes, and positions of the objects delineated, in reference to the vanishing point.