The state in which anything is already. The phrase is also used retrospectively, as when, on a treaty of place, matters return to the status quo ante bellum, or are left in statu quo ante bellum, i.e., the state (or, in the state) before the war.
Any woman who chooses to behave like a full human being should be warned that the armies of the status quo will treat her as something of a dirty joke. That's their natural and first weapon. She will need her sisterhood. Gloria Steinem