"Solitary Form" (1961) is an abstract bronze sculpture by Barbara Hepworth that exemplifies her mature modernist style, featuring a tall, elegant organic form with a hollow interior space that becomes integral to the work's meaning. The piece demonstrates Hepworth's characteristic interest in the relationship between solid mass and void, creating a sense of movement and tension through its curved surfaces and open apertures. Cast in bronze and typically displayed as an outdoor public monument, the sculpture reflects Hepworth's exploration of how form can suggest human presence and emotion while remaining purely abstract.