Someone who is a friend of two or more people, each of whom may not know each other.

Two people who count each other as friends / plural of mutual friend

(law) An incident of multiple assaults and batteries on all sides between involved parties which does not rise to the level of felonious assault or battery, or serious bodily harm, where parties involved are determined to have voluntarily entered into the affray and hence no criminal charges result, in relation to the assaults and batteries.

(biology, sociology) The state of cooperation, as opposed to competition, as a factor in evolution and social development.

plural of mutual fund

(finance) A form of collective investment in which money from many investors is pooled and invested in stocks, bonds, short-term money market instruments, or other securities under the direction of a fund manager.

A sexual activity in which two or more persons simultaneously masturbate themselves, usually while observing or otherwise communicating with one another.

(physics) the production of an electric current in a circuit by a changing current in a nearby one

(physics) The ratio of the voltage in a circuit to the change in current in a neighboring circuit.

plural of mutual information