where
u
pon
1
immediately after this; because of something mentioned
- She received the letter, whereupon she immediately called her lawyer.
- They reached an agreement, whereupon they signed the contract.
- The rain stopped, whereupon the sun emerged from behind the clouds.
2
used to indicate the location or place where something occurred
- He arrived at the castle, whereupon he beheld the magnificent courtyard.
- They reached the summit, whereupon they enjoyed panoramic views of the valley below.