Nothing is a term referring to the absence of certain attributes, or no things.
As things, and therefore the absence of things are context-dependent, there are many concepts which are "nothing".
- Nothingness on Earth (Air)
- Numerical nothingness (0)
- Spatial nothingness (Void)
- Set-theoretical nothingness (denoted as ∅, {}, or literally "null")
- A lack of useful properties or definitions
- Relative impossibility (i.e. "Nothing can possibly be bigger than this!")
- True impossibility (Concepts that only exist within imagination)