noun
plural -cades
[count] :a temporary wall, fence, or similar structure that is built to prevent people from entering a place or area
verb
-cades; -caded; -cading
[+ obj] :to block (something) so that people or things cannot enter or leave
barricade yourself
If you barricade yourself in/inside something, you prevent other people from entering the place where you are by locking the door or by putting up a barricade.