toprule
nounUK /ˈtɒpruːl/
US /ˈtɑːpruːl/
The top rule is the line at the very top of a page or table.
The teacher drew a thick toprule across the chart.
OTHER MEANINGS
2. A rule or law that is the most important one.
Safety is the toprule at the swimming pool.
3. The highest row in a spreadsheet or table.
Put the titles in the toprule of the sheet.
4. A line drawn above a piece of writing.
He added a toprule above his name.