What is the meaning of Dagger?

A stabbing weapon, similar to a sword but with a short, double-edged blade.

The text character ; the obelus.

A point scored near the end of the game (clutch time) to take or increase the scorer's team lead, so that they are likely to win.

To pierce with a dagger; to stab.

To perform the daggering dance.

A timber placed diagonally in a ship's frame.

Source: wiktionary.org