visitor         
noun [ C ] uk/ˈvɪz.ɪ.tər/ us/ˈvɪz.ɪ.t̬ɚ/
A2 访问者;参观者;游客
someone who visits a person or place
  You have some visitors to see you. 有人来看你了。 
  (网站的)访问者,浏览者
someone who goes to a website on the internet
 - More examples
 - There has been a steady decrease in the number of visitors to the museum.
 - For a few weeks in the summer, visitors are able to go round Buckingham Palace.
 - My mother's having visitors to stay next week.
 - Most foreign visitors to Britain enter the country legitimately.
 - New security measures require all visitors to sign in at reception and wear a visitor's badge.