A large tree of the genus Swietenia (S. Mahogoni), found in tropical America.
- Any of various tropical American evergreen trees of the genus Swietenia, valued for their hard, reddish-brown wood.
- The wood of any of these trees, especially that of S. mahogani, used in making furniture.
- Any of several trees having wood resembling true mahogany.
- The wood of any of these trees.
- A moderate reddish brown.