Safe journey, also equivalent with good luck.

Godspeed, to go with such speed as God; safe from harm, successful, etc.

From Middle English: from God speed you ‘may God help you prosper’.

An expression off good wishes to a person starting a journey.

2 John 9-11 Amplified Version Anyone who runs on ahead of God and does not abide in the doctrine of Christ, who is not content with what He taught, does not have God; but he who continues to live in the doctrine (teaching) of Christ, does have God, he has both the Father and the Son If any one comes to you and does not bring this doctrine, is disloyal to what Jesus Christ taught, do not receive him, do not accept him, do not welcome or admit him in to your house or bid him Godspeed or give him an encouragement. For he who wishes him success, who encourage him wishing him Godspeed is a partaker in his evil doings. Godspeed it this content appears to mean encouragement.

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RE:
What does the term 'Godspeed' mean?
I heard my friend say it to my other friend he said "See ya later, Godspeed"

What's it mean?

A wish for a prosperous journey, success, and good fortune. Your friend’s been watching too much tv! heheh

Entrusting you to the care & protection of God. Good wishes for your safety

some people think it means really fast, some say its a wish for a safe journey. I think its a little of both, actually

May God go with you and see you safely to your destination

it means good luck and god be with you

God be with you, until we meet again