anonymous

adj

1. (not-comparable)Lacking a name; not named, for example an animal not assigned to any species .
2. (not-comparable)Without any name acknowledged of a person responsible.

   “an anonymous pamphlet”

   “an anonymous subscription”

   “anonymous author or painter”

3. (not-comparable)Of unknown name; whose name is withheld

   “an anonymous author”

   “an anonymous benefactor”

   “No customer personal data will be retained unless it is rendered anonymous.”

   “The shift in the balance of power online has allowed anyone to publish to the world, from dispirited teenagers in south London to an anonymous cyber-dissident in a Middle East autocracy.”

4. (comparable, figuratively)Lacking individuality.

   “an anonymous office block in a soulless industrial estate”