Definition of "nameless" in English

adjective

1. Not having a name.

   • Environmental DNA analysis suggests that the number of species of bacteria that remain nameless to date may well be on the order of many thousands.

2. Whose name is unknown; unidentified or obscured.

   • The culprits shall remain nameless here, as some names have been changed to protect the guilty; just don't let it happen again.

3. Unable to be described or expressed.

   • a nameless unease
   • a nameless fear

4. (dated, of a child) Illegitimate.

noun

1. (obsolete) Vulva.