What is the meaning of Shrapnel?

An anti-personnel artillery shell used in World War I which carries a large number of individual bullets close to the target and then ejects them to allow them to continue along the shell's trajectory and strike the target individually.

The bullets from the aforementioned type of artillery shell.

Shot, fragments, or debris thrown out by an exploding shell, bomb or landmine.

Loose change.

Debris.

shrapnel

Source: wiktionary.org