1. a long journey full of adventures and difficulties
2. a long series of experiences that involve many changes and developments
Usage: often used figuratively

Examples

• The family’s cross-country move became an odyssey of unexpected delays and detours.
• Her odyssey from small-town student to successful entrepreneur took fifteen years.
• The refugees faced a dangerous odyssey across the mountains to reach safety.
• Starting his own business proved to be an odyssey of challenges and setbacks.
• The research team’s odyssey to the remote island lasted three months.
• His odyssey through the legal system finally ended with a favorable verdict.