mutual /ˈmjuːt͡ʃuəl/adjective 5noun 3forms 3phrases 1 adjective5 •the same in both directions between two people or groups, each toward the otherThey were mutual enemies. •Reciprocal.They had mutual fear of each other. •Collective, done or held in common.Mutual insurance. •Possessed in common.They had been introduced by a mutual friend. •Owned by the members. noun3 •(Internet) Either of a pair of people who follow each other's social media accounts. •A mutual fund. •A mutual organization. formsmutuals · more mutual · most mutual Phrases with mutual mutual admiration societyA 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.