(transitive) To form or collect into a mass; to form into a collective body; to bring together into masses; to assemble. / (intransitive) To have a certain mass.

(Christianity) The Eucharist, now especially in Roman Catholicism. / (Christianity) Celebration of the Eucharist. / (Christianity, usually as the Mass) The sacrament of the Eucharist.

A quantity of matter cohering together so as to make one body, or an aggregation of particles or things which collectively make one body or quantity, usually of considerable size.

Involving a mass of things; concerning a large quantity or number. / Involving a mass of people; of, for, or by the masses.

(intransitive, obsolete) To celebrate mass.

(Roman Catholic Church) The principal liturgical service of the Church, including a scripture service and a eucharistic service, which includes the consecration and oblation (offering) of the host and wine.

Abbreviation of Massachusetts. / Alternative form of Mas

Abbreviation of Massachusetts.

Eggcorn of en masse.

A surname from French.