1. (a.) Pertaining to a line; in a straight direction\.

2. (a.) Like a line; narrow; of the same breadth throughout, except at the extremities; as, a linear leaf.

Plimsoll line Plimsoll mark arrowlike catenary consecutive dead straight direct even flat high-water mark horizontal in a line level lineal load waterline ordinal progressive rectilineal rectilinear right ruler-straight sequent sequential serial seriate smooth straight straight-cut straight-front straight-side streamlined successional successive tidemark TRUE unbending unbent unbowed unbroken uncurved undeflected undeviating undistorted uninterrupted unswerving unturned upright vertical waterline watermark