openedge
nounUK /ˈəʊpənɛdʒ/
US /ˈoʊpənɛdʒ/
The open edge is the side of something that is not closed or covered.
She held the open edge of the envelope so the letter could slide out.
OTHER MEANINGS
2. The cutting side of a blade that is not covered by a guard.
Keep your fingers away from the open edge of the knife.
3. The part of a fabric or garment that is not hemmed or finished.
The open edge of the scarf began to fray.
4. In computing, a boundary of a file or data stream where reading or writing can continue.
The program stopped when it reached the open edge of the file.