dis·al·low verb (used with object) 1.to refuse to allow; reject; veto: to disallow a claim for compensation. 2.to refuse to admit the truth or validity of: to disallow the veracity of a report. Origin: 1350–1400; Middle English < Old French desallouer. See dis-1 , allow Related forms dis·al·low·a·ble, adjective dis·al·low·a·ble·ness, noun dis·al·low·ance, noun
If you are talking about disallow of robot.txt then it is : It should not allow to index any pages of website to robot.
Gals & Guys : Appreciate your reply! I am talking about robots.txt file disallow attribute, not the meaning of disallow. As we know that when we write (disallow:/) it means that we don't want search engine to index our pages, but i don't know what ( ? ) means after the ( / ). I got this question in an interview for the post of SEO Manager.
If you had given this information in the first post of the thread....you would have got more relevant answers
Well, I also see it in robot.txt but I leave it thinking that it is by default... I haven't tried to learn it but I learned today.
I hope you learnt how to ask a question properly. It's a valuable skill. With regards to an answer, it will disallow URLs that start with a question mark.