Definitions

1. noun

A Sunday that is the day after Trinity Sunday and the day of the Christian festival of Pentecost, which commemorates the descent of the Holy Spirit upon the apostles.

“The family spent a relaxing Whitsunday at the beach with their extended family.”

2. proper noun

Whitsunday Island, a small coral cay in the Whitsunday Islands, Queensland, Australia.

“The tourists took a boat trip to Whitsunday Island to snorkel in the crystal-clear waters.”