| Adj. | 1. | linear - designating or involving an equation whose terms are of the first degreemath, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement nonlinear - designating or involving an equation whose terms are not of the first degree | |
| 2. | linear - of or in or along or relating to a line; involving a single dimension; "a linear foot" | |
| 3. | linear - of a circuit or device having an output that is proportional to the input; "analogue device"; "linear amplifier"electronics - the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices | |
| 4. | linear - of a leaf shape; long and narrowunsubdivided, simple - (botany) of leaf shapes; of leaves having no divisions or subdivisions | |
| 5. | linear - measured lengthwise; "cost of lumber per running foot"lengthways, lengthwise - running or extending in the direction of the length of a thing; "the lengthwise dimension" | |