- expulsion or removal from a place or position occupied: The opposition called for the ouster of the cabinet minister.
- an ejection or eviction; dispossession.
- a wrongful exclusion from real property.
- property law the act of dispossessing of freehold property; eviction; ejection
n.“ejection from property,” 1530s, noun use of Anglo-French ouster (see oust). For other such usages, see waiver.