What is the meaning of undertaking?

noun

• Any piece of work that is undertaken or attempted.
  • usage: "he prepared for great undertakings"
  • synonyms: project, task, labor
• The trade of a funeral director.

verb

• Enter upon an activity or enterprise.
  • synonyms: undertake, set about, attempt
• Accept as a challenge.
  • usage: "I'll tackle this difficult task"
  • synonyms: undertake, tackle, take on
• Promise to do or accomplish.
  • usage: "guarantee to free the prisoners"
  • synonyms: undertake, guarantee
• Enter into a contractual arrangement.
  • synonyms: contract, undertake
• Accept as a charge.
  • synonyms: undertake, take in charge