noun / verb
dimension
dye-MEN-shun/daɪˈmenʃn/
An independent direction along which extent is measured.
The arrows show the box's three dimensions: length, width, and height.

Etymology
The pieces express the action of measuring out. From a measurable extent, such as length or breadth, dimension broadened to mean an aspect or component of a situation.
In context
what is the change in the linear dimension along x, disregarding what happens along y and z. So, let us keep that target, let us say that delta x is the length of the fluid element
More examples
- A flat surface has two dimensions: length and width.
- Check the sofa's dimensions before carrying it through the doorway.
- The engineer dimensions the drawing to specify each part's size.
Forms
dimension · dimensions · dimensioned · dimensioning
dimensional adjective — Relating to measurable directions or extents.
Similar words
- axis
- A reference line defining a direction, rather than measurable extent.
- measurement
- Emphasizes the measured value rather than the independent direction.