Giant (noun)

1. A person or thing of extraordinary size or power.
2. A mythical being of human form but superhuman size.
3. A person or company of immense power or influence.
4. A legendary figure of great size and strength.
5. A large, powerful or influential person or company.

Origin:

From middle english giaunt, giaunt, gyaunt, from old french geant, from latin gigantem (nominative gigas), from ancient greek γίγας (gígas), from a pre-greek language.

Examples:

1. The giant redwood trees are the largest living things on earth.
2. The giant in the fairy tale was fierce but kind-hearted.
3. The giant corporation dominates the market.
4. He was a giant in the field of science.
5. The giant wave was a spectacle to behold.