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.
Willis Tower. Photo from CoStar Group Inc. United Airlines is doing what it promised for downtown Chicago and more, moving its headquarters into 200,000 square feet at the Willis Tower and extending its lease for 625,000 square feet it already occupies there for an additional two years.