to exist separately or independently but peaceably, often while remaining rivals or adversaries: Although their ideologies differ greatly, the two great powers must coexist.
To exist together, at the same time, or in the same place.
To live in peace with another or others despite differences, especially as a matter of policy: "recognize and accept, as every President in the nuclear age has, that this means coexisting with the Soviet Union"(McGeorge Bundy).