Fillet
A modify command that creates a rounded corner between two objects using a specified radius.
The Fillet command rounds the corner where two objects meet. AutoCAD can trim or extend the source objects automatically to create the smooth connection.
Where It Appears
You use Fillet with FILLET when drawing mechanical parts, interior corners, paths, and other geometry that needs a rounded transition.
Why It Matters
Fillet is faster and more precise than manually drawing arcs between intersecting objects. It also keeps corner radii consistent across the drawing.
How This Shows Up in AutoCAD
This term shows up when existing geometry is being shaped, refined, cleaned, or adjusted into production-ready form. Fillet sits in the Drawing & Editing part of the glossary, which tells you the term is most relevant when that stage of work is active.
Fillet usually appears under the same name in commands, documentation, and training material. Learning the exact wording helps users recognize it faster when it appears in instructions or review comments.
What This Usually Tells You
When it is mentioned, the underlying question is usually how to control geometry quality, continuity, or precision instead of simply drawing more objects. Editing vocabulary matters because the difference between rough geometry and usable geometry is usually created in these cleanup and refinement steps.
For Fillet, the practical takeaway is that the term usually marks a repeatable drafting decision, not a one-off trick. It signals something a user should recognize, control, or verify on purpose.
Common Mistakes
A common mistake is using editing tools before the intended reference points are clear. These operations become much more reliable once base geometry and snaps are already under control.
Fillet is easiest to separate from nearby ideas such as Chamfer, Crossing Selection, Grips, and Hatch. Reading those terms together clarifies which part of the workflow belongs to Fillet and which part belongs to adjacent tools or concepts.