border line; grid line; enclosing line
Refers to a visible line that forms a border around a cell, table, text box, or graphic element. Common in spreadsheet, design, and layout contexts.
Please make the table's border lines thicker.
この図形の枠線の色を変えたい。
I want to change the color of this shape's outline.
Compound of 枠 (わく, 'frame') and 線 (せん, 'line').