If something's concealed, it's out of sight. People may have concealed motives for carrying concealed weapons.
This is a word for the many things people like to hide. If the government has a secret agenda, they have a concealed agenda they don't want anyone to know. Magicians use many concealed objects and people to do their tricks. Someone might win a poker game because they concealed their emotions. A concealed ace up your sleeve will help too. Once something is revealed—like an affair or a scandal—it's no longer concealed.