Source : WordNet®

let on
     v : make known to the public information that was previously
         known only to a few people or that was meant to be kept a
         secret; "The auction house would not disclose the price
         at which the van Gogh had sold"; "The actress won't
         reveal how old she is"; "bring out the truth"; "he broke
         the news to her" [syn: {disclose}, {bring out}, {reveal},
          {discover}, {expose}, {divulge}, {impart}, {break}, {give
         away}, {let out}]