- an expression of one's good wishes for a person's success and safety
WordReference Random House Unabridged Dictionary of American English © 2020
God•speed (god′spēd′),USA pronunciation n.
- good fortune;
success (used as a wish to a person starting on a journey, a new venture, etc.).
- Middle English, in the phrase God spede may God prosper (you). See God, speed 1250–1300
Collins Concise English Dictionary © HarperCollins Publishers::
Godspeed /ˈɡɒdˈspiːd/ interj , n