(politics, public policy, military) The threat of massive retaliation using nuclear weapons should a potential enemy use them first, both sides being annihilated in the event of war.

(idiomatic, derogatory) A group of two or more people, in a workplace or other social environment, who routinely express considerable esteem and support for one another, sometimes to the point of exaggeration or pretense.

(logic, probability theory) Describing multiple events or propositions such that the occurrence of any one implies the nonoccurrence of all other events or propositions.

(linguistics) Of two or more speech varieties, able to be understood by one another's speakers.

Alternative form of mutual assured destruction

(formal, history) Synonym of Warsaw Pact

Alternative spelling of mutualization

plural of mutualisation

Of, supporting, pertaining to, or advocating mutualism / (biology) symbiotic

(biology) Any organism in a symbiotic relation / (politics) A person who advocates mutualism