nothing-n; 3 Senses

Sense Number 1: a quantity of zero

Commentary: NOTHING[+quantity][+zero]

Examples:
The bill for dinner came to almost nothing. (a bit figurative)
The fuel gauge is reading nothing, we'd better find a gas station.
Five minus five leaves nothing.

Mappings:
WordNet 3.0 Sense Numbers: 1

Sense Number 2: nonexistence, a non-existent thing

Commentary: NOTHING[+entity][-existent]

Examples:
Heidegger's philosophical question was why is there something rather than nothing.
Those accusations turned out to be nothing. (no true state of affairs corresponded to them)

Mappings:

Sense Number 3: insignificant value or worth

Commentary: NOTHING[+quality][+value][-significant]

Examples:
The man felt like a big nothing.
Sally considers their line of cosmetics to be nothing.
She seems to get upset over nothing. (events or situations of trivial significance)

Mappings:
WordNet 0.0 Sense Numbers: 2