heroic (adj.)

1540s, "having or displaying the qualities of a hero," shortened from heroical (early 15c., also heroycus) "noble, magnanimous," from Latin heroicus "of a hero, heroic, mythical," from Greek hērōikos "of or for a hero, pertaining to heroes," from hērōs (see hero (n.1)). In some modern uses, "having recourse to extreme measures." The Heroic Age, semi-mythical prehistoric period in Greece, ended with the return of the armies from the fall of Troy. Related: Heroically. Heroic verse (1610s), decasyllabic iambic, is from Italian.

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Definitions of heroic
heroic (adj.)
very imposing or impressive; surpassing the ordinary (especially in size or scale);
heroic sculpture
of heroic proportions
Synonyms: epic / larger-than-life
heroic (adj.)
relating to or characteristic of heroes of antiquity;
heroic legends
the heroic age
heroic (adj.)
having or displaying qualities appropriate for heroes;
the heroic attack on the beaches of Normandy
heroic explorers
Synonyms: heroical
heroic (adj.)
of behavior that is impressive and ambitious in scale or scope;
heroic undertakings
Synonyms: expansive / grand
heroic (adj.)
showing extreme courage; especially of actions courageously undertaken in desperation as a last resort; "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
heroic (n.)
a verse form suited to the treatment of heroic or elevated themes; dactylic hexameter or iambic pentameter;
Synonyms: heroic verse / heroic meter