1. the moment when a rocket or spacecraft leaves the ground and begins to rise
2. the beginning or start of something important
Usage: figurative

Examples

• The rocket’s liftoff was delayed due to bad weather.
• We watched the space shuttle’s liftoff on television.
• Mission control counted down to liftoff.
• The successful liftoff marked the beginning of the Mars mission.
• After years of preparation, the new company finally had its liftoff.
• The project’s liftoff exceeded all expectations.