adjective
linear
LIN-ee-er/ˈlɪniər/
Extending along a single line or direction.
The six wooden cubes form a linear arrangement in one straight row.

Etymology
Linea and the adjectival ending give “belonging to a line.” This makes a line the model for both a physical arrangement and progression along a direct sequence.
In context
a linear narrative is a story structure in which events are presented in a chronological or straightforward manner the linear part basically just means a straight line
More examples
- The plant has narrow, linear leaves.
- The story follows a linear sequence from childhood to adulthood.
- The store sells rope by the linear foot.
Forms
linear
linearly adverb — In a straight or sequential manner.