| adjective | designating or involving an equation whose terms are of the first degree |
| adjective | of or in or along or relating to a line; involving a single dimension “a linear measurement” |
| adjective | of a circuit or device having an output that is proportional to the input “analogue device” |
| adjective | (of a leaf shape) long and narrow |
| adjective | measured lengthwise “cost of lumber per running foot” |
| linearity | noun | the property of having one dimension |
| add | verb | determine the sum of |