To achieve a clean and aesthetically pleasing finish at the meeting point of a door and its fixed part (like a frame or a wall), you can follow these guidelines:

Proper Alignment: Ensure the door is correctly aligned with the frame. Adjust hinges as needed; sometimes tightening or replacing screws can help if they’ve become loose​.

Weatherstripping: Install weatherstripping around the door frame to minimize gaps. This not only improves energy efficiency but also ensures a snug fit, preventing drafts. Choose a weatherstrip material suitable for your door’s frequency of use; for example, rubber or vinyl is durable for high-traffic doors​.

Trim and Molding: Use trim or molding around the door and frame junction. This can effectively cover any minor gaps and create a polished look. Ensure the trim is cut at a 45-degree angle for corners to create a seamless appearance. Caulk any joints between the trim and wall for a clean finish.

Door Sweeps: Add a door sweep at the bottom of the door to seal off any gaps that may allow air or insects to enter. Align it properly so it meets the threshold without leaving a gap​.

Finishing Touches: Once everything is installed, paint or finish the trim and the door to match, ensuring there are no visible lines or inconsistencies. This helps in achieving a cohesive and attractive look.

Following these steps will help you create a visually appealing and functional doorway that eliminates gaps and enhances the overall aesthetics of your space.