What is the meaning of heroic?

noun

• A verse form suited to the treatment of heroic or elevated themes; dactylic hexameter or iambic pentameter.
  • synonyms: heroic verse, heroic meter

adjective

• Very imposing or impressive; surpassing the ordinary (especially in size or scale. )
  • usage: "an epic voyage"; "of heroic proportions"; "heroic sculpture"
  • synonyms: epic, larger-than-life
• Relating to or characteristic of heroes of antiquity.
  • usage: "heroic legends"; "the heroic age"
• Having or displaying qualities appropriate for heroes.
  • usage: "the heroic attack on the beaches of Normandy"; "heroic explorers"
  • synonyms: heroical
• Of behavior that is impressive and ambitious in scale or scope.
  • usage: "an expansive lifestyle"; "in the grand manner"; "collecting on a grand scale"; "heroic undertakings"
  • synonyms: expansive, grand
• Showing extreme courage; especially of actions courageously undertaken in desperation as a last resort.
  • usage: "made a last desperate attempt to reach the climber"; "the desperate gallantry of our naval task forces marked the turning point in the Pacific war- G. C. Marshall; "they took heroic measures to save his life"
  • synonyms: desperate