What is the meaning of Below?

Lower in spatial position than.

Lower than in value, price, rank, concentration, etc.

Downstream of.

South of.

Unsuitable to the rank or dignity of; beneath.

Downstage of.

In or to a lower place.

On or to a lower storey.

On or to a lower deck, especially as relative to the main deck.

Later in the same text.

Below zero.

Source: wiktionary.org