noun / verb
miter
MY-ter/ˈmaɪtər/
An angled cut or joint, or the act of making one.
The matching angled cuts form a miter at the frame's corner.

Etymology
The joint's name may come from the mitre, a bishop's folded cap, through the joining of its two peaks. That proposed connection to the angled joint remains uncertain.
In context
the two boards are joint at an angle instead of square to one another the advantage is the miter joint will not show any end grain
More examples
- A small gap shows where the miter does not fit tightly.
- He mitered both ends of the board at 45 degrees.
- Check all four miters before gluing the picture frame together.
Forms
miter · miters · mitered · mitering