a flat-needled evergreen tree (Abies balsamea) of the pine family, native to Canada and the N U.S.: it yields Canada balsam and a soft wood, and is used as a Christmas tree
See balsam fir in American Heritage Dictionary 4
noun
A North American tree (Abies balsamea) having a pyramidal shape and flattened needles. It is widely used as a Christmas tree and yields Canada balsam and pulpwood.