Medical Definition of dorsiflexion. : flexion in a dorsal direction; especially : flexion of the foot in an upward directionâcompare plantar flexion.
Willis Tower. The Willis Tower, built as and still commonly referred to as Sears Tower, is a 108-story, 1,450-foot (442.1 m) skyscraper in Chicago, Illinois, United States.
It is owned by a group of investors including American Landmark Properties Ltd. The ownership did not change. Sears has not had offices in the tower for nearly 20 year â¦ s. Willis has been leasing space in the building and recently became the largest tenant.