"concealed door" is a grammatically correct and commonly used phrase in written English.
You can use it whenever you want to describe a door that is hidden or not easily visible. This could be in the context of a secret passageway, a hidden compartment, or a disguised entryway. Example: The old mansion had a concealed door behind a bookshelf that led to a hidden room filled with treasure.
❦ In that emergency department there was a concealed door that led to a small yard out back.
The General Motors division succeeded in transferring the concealed door handle of the 1999 Evoq concept car, which defined the so-called Art and Science look, to the production car that it inspired, the 2004 XLR.
"Can I tell you, these crappy dogs just cost me nine hundred dollars to do their teeth, and that's with the fifteen-per-cent discount the vet gave me?" Adams asked, as her two Yorkies, Jazzy and Juicy, swirled around her feet in a brown-and-black blur, before disappearing behind a concealed door into the kitchen.
From a nearby coffee shop, a chicken farmer turned double agent called Garbo filed fake reports to the Nazis; while in the Avenida Palace Hotel a concealed door led directly into Rossio railway station, so that furtive figures carrying vital intelligence, could avoid the waiting secret police at its main entrance.
Punch the numbers into a telephone dial pad in a phone booth outside the bar,and a concealed door swings open to reveal a classic cocktail joint that swaggers with the decadence of a 1920s Chicago speakeasy.
Up the stairs we go, until the man opens a concealed door and smiles.
It connects, through a pair of concealed doors, to an enormous wraparound walk-in closet.
The bathtub was behind another of the apartment's concealed doors, which Adams flung open to reveal her combined dressing room and office, the walls and ceiling of which were covered with laminated tabloid front pages displaying Adams's scoops.
Search-and-rescue experts who deal with dementia patients also recommend alarms on doors that sound when opened if a proper code is not entered, along with posters or wallpaper images that disguise or conceal doors.
There's no three-door version any more, but the five-door looks like a three-door because it has concealed rear door handles.
It's a rather large watch that features a concealed trap door for the lens.
