Being without a name; anonymity. Often used for anonymous posts or when the name is not disclosed.
掲示板に名無しで書き込んだ。
I posted on the message board as 'nameless' (anonymous).
その手紙は差出人が名無しで送られてきた。
The letter was sent with the sender's name left blank (anonymous).
ネットでは『名無しの権兵衛』という表現が匿名の人を指すことがある。
On the internet, the phrase '名無しの権兵衛' is sometimes used to refer to anonymous users.