constant-width
adjectiveUK /ˈkɒn.stənt wɪdθ/
US /ˈkɑːn.stənt wɪdθ/
Always staying the same width, not getting wider or narrower.
The constant-width font makes every letter take up the same space.
OTHER MEANINGS
2. In design, a shape or line that keeps the same thickness all along its length.
The artist drew a constant-width stripe across the page.
3. In engineering, a part or material whose measurement across stays the same.
The constant-width beam fits perfectly into the slot.
4. In typography, text where each character occupies an equal amount of horizontal space.
Code is often shown in constant-width text so columns line up.