Oust"er (?), n. [Prob. fr. the OF.
infin. oster, used substantively. See Oust.] A
putting out of possession; dispossession; ejection;
disseizin.
Ouster of the freehold is effected by
abatement, intrusion, disseizin, discontinuance, or
deforcement.
Blackstone.
Ouster le main. [Ouster + F. la
main the hand, L. manus.] (Law) A delivery of
lands out of the hands of a guardian, or out of the king's hands, or
a judgement given for that purpose. Blackstone.