Of or pertaining to the male gender; manly. / Of or pertaining to the male sex; biologically male, not female. / Belonging to males; typically used by males.

(grammar) The masculine gender. / (grammar) A word of the masculine gender. / That which is masculine. / (rare, possibly obsolete) A man.

An assembly or party of people wearing (usually elaborate or fanciful) masks and costumes, and amusing themselves with dancing, conversation, or other diversions.

(intransitive) To take part in a masquerade; to assemble in masks and costumes; (loosely) to wear a disguise.

plural of weapon of mass destruction

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.

(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.

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

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

(intransitive, obsolete) To celebrate mass.