anonymous
1. [ adjective ] having no known name or identity or known source
Synonyms: anon.
Examples:

"anonymous authors" "anonymous donors" "an anonymous gift"

Related terms: onymous nameless
2. [ adjective ] not known or lacking marked individuality
Examples:

"brown anonymous houses" "anonymous bureaucrats in the Civil Service"

Related terms: faceless
Similar spelling:   anonymously
  anonym
  anonymity
  anemone