What is the meaning of take on?

verb

• Take on a certain form, attribute, or aspect.
  • usage: "His voice took on a sad tone"; "The story took a new turn"; "he adopted an air of superiority"; "She assumed strange manners"; "The gods assume human or animal form in these fables"
  • synonyms: assume, acquire, adopt, take
• Take on titles, offices, duties, responsibilities.
  • usage: "When will the new President assume office"
  • synonyms: assume, adopt, take over
• Accept as a challenge.
  • usage: "I'll tackle this difficult task"
  • synonyms: undertake, tackle
• Admit into a group or community.
  • usage: "accept students for graduate study"; "We'll have to vote on whether or not to admit a new member"
  • synonyms: accept, admit, take
• Contend against an opponent in a sport, game, or battle.
  • usage: "Princeton plays Yale this weekend"; "Charlie likes to play Mary"
  • synonyms: meet, encounter, play