1to have the mood or interest dampened; to cause an atmosphere to become flat or unamused (e.g., when a joke falls flat).
彼の冗談で場がしらけてしまった。
His joke killed the mood.
大声で批判されて、会議が一気にしらけた。
After the loud criticism, the meeting quickly became flat.
彼女の無関心な態度に、みんながしらけた。
Everyone was put off by her indifferent attitude.
2to turn or become white; to fade to a pale/light color; to grow light (as at dawn).
夜が白けて、東の空が薄く明るくなった。
The night lightened and the eastern sky grew faintly bright.
古い布は日に当たって白けてしまった。
The old cloth faded to a pale color from the sun.