ˈhɪd(ə)n əbˈskjʊə(ɹ) əbˈskjʊɹ ˈsiːkɹɪt difficult to find hidden valleys a hidden cave an obscure retreat designed to elude detection a hidden room or place of concealment such as a priest hole a secret passage the secret compartment in the desk not accessible to view concealed (or hidden) damage in stormy weather the stars are out of sight