1. plural of liftoff; the moments when spacecraft or rockets leave the ground and begin flight
Usage: aerospace

Examples

• The space center scheduled three rocket liftoffs for this month.
• Weather conditions delayed several liftoffs at the launch facility.
• Spectators gathered to watch the morning liftoffs from the viewing area.
• Mission control monitors all liftoffs carefully for safety.
• The documentary showed historic liftoffs from the 1960s space program.
• Engineers reviewed data from previous liftoffs before the next launch.