What is the meaning of Communicant?

A person who receives (or is allowed to receive) the elements (i.e., bread and wine) of the sacrament of Holy Communion. (Compare also these terms: communion, Communion, Lord's Supper, Mass, Eucharist, Divine Liturgy.)

One who communicates.

Communicating.

a communicant, one receiving Holy Communion

communicating

third-person plural present active indicative of commūnicō

Source: wiktionary.org