prosper UK /ˈpɹɒspə(ɹ)/US /ˈpɹɑspɚ/ verb3 •To be successful; to succeed; to be fortunate or prosperous; to thrive; to make gain. •To grow; to increase.And his master saw that the Lord was with him, and that the Lord made all that he did to prosper in his hand. — 1611 •(no longer used) To favor; to render successful.Prosper thou our handiwork. — 1549 formsprospered · prospering · prospereth · prospers · prosperest