concealment in WordNet English dictionary

1. the activity of keeping something secret
   concealment  concealing  hiding 
   
2. a covering that serves to conceal or shelter something
   "a screen of trees afforded privacy"; "under cover of darkness"; "the brush provided a covert for game"; "the simplest concealment is to match perfectly the color of the background"
   screen  cover  covert  concealment 
   
3. the condition of being concealed or hidden
   privacy  privateness  secrecy  concealment