What is the meaning of cheer?

noun

• A cry or shout of approval.
• The quality of being cheerful and dispelling gloom.
  • usage: "flowers added a note of cheerfulness to the drab room"
  • synonyms: cheerfulness, sunniness, sunshine

verb

• Give encouragement to.
  • synonyms: hearten, recreate, embolden
• Show approval or good wishes by shouting.
  • usage: "everybody cheered the birthday boy"
• Cause (somebody) to feel happier or more cheerful.
  • usage: "She tried to cheer up the disappointed child when he failed to win the spelling bee"
  • synonyms: cheer up, jolly along, jolly up
• Become cheerful.
  • synonyms: cheer up, chirk up
• Spur on or encourage especially by cheers and shouts.
  • usage: "The crowd cheered the demonstrating strikers"
  • synonyms: root on, inspire, urge, barrack, urge on, exhort, pep up