a.

1. 線的，直線的；使用線的
   a linear design

   線條圖案

2. 長度的
   linear measurements

   長度

3. 線狀的；【植】線形的
   a linear leaf

   長葉片

4. 【數】一次的；線性的
5. 【化】線性的

adj.

1. arranged in or extending along a straight line.
   ▸consisting of lines or outlines.
   ▸involving one dimension only.
2. sequential:
   a linear narrative.
3. Mathematics  able to be represented by a straight line on a graph.
   ▸involving directly proportional change in two related quantities.