1Space available or intended for social interaction. As a count noun: an area set aside for social interaction.
In early use probably not as a fixed collocation.
The gap, in terms of social status, that is felt to exist between members of one social or ethnic group and those of another.
Mid 19th century; earliest use found in Garth Wilkinson (1812–1899), Swedenborgian writer and homoeopath. From social + space.