start up meaning and definition

START UP verb

Definition of start up (verb)

1. get going or set in motion
   • "We simply could not start the engine"; "start up the computer"
   • synonyms: start
   • antonym: stop
2. get off the ground
   • "Who started this company?"; "We embarked on an exciting enterprise"; "I start my day with a good breakfast"; "We began the new semester"; "The afternoon session begins at 4 PM"; "The blood shed started when the partisans launched a surprise attack"
   • synonyms: commence, embark on, start