Redwood refers to a type of tree that is native to the west coast of North America. These trees are known for their height, with some species reaching over 350 feet tall. They have thick, reddish-brown bark and needle-like leaves. Redwoods can live for thousands of years and are considered one of the oldest living organisms on Earth. The term "redwood" is also used metaphorically to describe something that is very large or impressive in size or scope, such as a redwood tree being referred to as a "giant among trees."