Meaning : Not accessible to view.
Example :
Concealed (or hidden) damage.
In stormy weather the stars are out of sight.
Synonyms : concealed, out of sight
Meaning : Designed to elude detection.
Example :
A hidden room or place of concealment such as a priest hole.
A secret passage.
The secret compartment in the desk.
Synonyms : secret
Meaning : Difficult to find.
Example :
Hidden valleys.
A hidden cave.
An obscure retreat.
Synonyms : obscure