In mathematics and physics, non-Archimedean refers to something without the Archimedean property. This includes:

• Ultrametric space
  • in particular, a domain with non-Archimedean absolute value
  • notably, p-adic numbers
• Non-Archimedean ordered field, namely:
  • Levi-Civita field
  • Hyperreal numbers
  • Surreal numbers
  • Dehn planes
• Non-Archimedean time in theoretical physics