"Open seat" refers to an available or empty spot, typically used to describe a vacant seat in a public place or an unoccupied position in a meeting, event, or event venue. Full definition
Analysts have examined the rankings parents provide when applying for open seats in these cities as a means to discern the characteristics they value most. (nsba.org)
Industry groups say they expect to keep an especially close eye on the dozen or so races for open seats. (realtormag.realtor.org)
The number of open seats for professional basketball players expanded by a factor of ten or more. (authorearnings.com)