what does linear portion mean
â¢ LINEAR (adjective) The adjective LINEAR has 5 senses: 1. designating or involving an equation whose terms are of the first degree. 2. of or in or along or relating to a line; involving a single dimension. 3. of a circuit or device having an output that is proportional to the input. 4. of a leaf shape; long and narrow. 5. measured lengthwise.