giant

noun

• 1an imaginary or mythical being of human form but superhuman size.
• an abnormally or extremely tall or large person, animal, or plant.
• a very large company or organization.
• a person of exceptional talent or qualities:a giant among sportsmen

• 2 Astronomy a star of relatively great size and luminosity compared to ordinary stars of the main sequence, and 10-100 times the diameter of the sun.

adjective

• of very great size or force; gigantic:giant multinational corporations a giant meteorite
• used in names of very large animals and plants, e.g. giant hogweed, giant tortoise.