Other forms: ousted, ousting, ousts
To oust is to force somebody out of a position. Oust the leader, ousted from office, oust him from the board.
It is nearly always about power rather than premises and nearly always passive. The Anglo-Norman behind it is a legal word for dispossessing somebody, which is the sense it keeps.
1verboustTo force somebody out of a position.
“The rebels ousted the president and took control of the capital.”
oust is a removing.
Anglo-Norman ouster means to remove, from Latin obstare, to stand in the way.
Latin
obstare — to remove
Old French
oster
Anglo-Norman
ouster
English, today
oust
Built from
From Anglo-Norman ouster, oustier, from Old French oster (modern French ôter), from post-classical Latin obstare (“to remove”), classical obstare (“to obstruct, stand in the way of”). Not related to out.
Etymology from Wiktionary, CC BY-SA