Noun

1. A conceptual space that groups classes, identifiers, etc. to avoid conflicts with items in unrelated code that have the same names.

Verb

1. To categorize by placing into a namespace.
   • 2004, Michael Kay, XSLT 2.0 Programmer's Reference‎

     Something I haven't captured in this schema is that the GEDCOM spec also says the structure is extensible; arbitrary namespaced elements may be inserted...

   • 2007, Jonathan Snook, Aaron Gustafson, Stuart Langridge, Dan Webb, Accelerated DOM Scripting with Ajax, APIs, and Libraries‎

     Although the excessive namespacing might seem like a hassle, there's always a really quick way to create a shortcut.

   • 2007, Jon Arking, Professional Windows Live Programming‎

     SOAP adheres to extensive namespacing and attribute specification tags.