D defs.my
Entry 2 senses Webster, 1913

Mutual

/myo͞och'-o͞o-əl/ · Mu·tu·al · IPA /ˈmjuːt͡ʃuəl/
01 a. Reciprocally acting or related; reciprocally receiving and giving; reciprocally given and received; reciprocal; interchanged; as, a mutual …
  1. 1.
    Reciprocally acting or related; reciprocally receiving and giving; reciprocally given and received; reciprocal; interchanged; as, a mutual love, advantage, assistance, aversion, etc.
    “Conspiracy and mutual promise.” — Sir T. More.
    “Happy in our mutual help, And mutual love.” Milton.
    “A certain shyness on such subjects, which was mutual between the sisters.” G. Eliot.
  2. 2.
    Possessed, experienced, or done by two or more persons or things at the same time; common; joint; as, mutual happiness; a mutual effort.
    “A vast accession of misery and woe from the mutual weeping, and wailing, and gnashing of teeth.” Bentley.
    Mutual, as Johnson will tell us, means something reciprocal, a giving and taking. How could people have mutual ancestors?” — P. Harrison.
Phrases & compounds
Mutual insurance — agreement among a number of persons to insure each other against loss, as by fire, death, or accident.
Mutual insurance company — one which does a business of insurance on the mutual principle, the policy holders sharing losses and profits pro rata.