Other forms: concealed; conceals
When you conceal something, you are keeping it from being discovered: “To avoid another argument with his cousins, Jonathan worked hard to conceal his disappointment at the outcome of the race.”
The verb conceal can be used to describe the hiding of feelings (as in “to conceal anger”) or facts (as in “to conceal identity”). Conceal also can be used to describe the act of hiding or covering an item to prevent discovery. If you eat the last piece of chocolate cake, for example, you may want to conceal the evidence by removing the icing-stained plate from your room.