Meaning of “reveal” - Learner’s Dictionary

reveal

verb [ T ] uk us /rɪˈviːl/
TELL

B2 to give someone a piece of information that is surprising or that was previously secret:

[ + that ] It was revealed in this morning's papers that the couple intend to marry.
SEE

to allow something to be seen that was previously hidden:

His shirt came up at the back, revealing an expanse of white skin.

(Definition of “reveal” from the Cambridge Learner’s Dictionary © Cambridge University Press)