sealed

Etymology

verb

1. simple past and past participle of seal

adj

1. Closed by a seal.
   Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet. 2013-06-14, Jonathan Freedland, “Obama's once hip brand is now tainted”, in The Guardian Weekly, volume 189, number 1, page 18
2. Preventing entrance.
3. Of a road: having an asphalt or macadamised surface.
4. (object-oriented programming) Not subclassable; from which one cannot inherit.