Chant

a short, simple melody, especially one characterized by single notes to which an indefinite number of syllables are intoned, used in singing psalms, canticles, etc., in church services.
a psalm, canticle, or the like, chanted or for chanting.
the singing or intoning of all or portions of a liturgical service.
any monotonous song.
a song; singing:
the chant of a bird.
a monotonous intonation of the voice in speaking.
a phrase, slogan, or the like, repeated rhythmically and insistently, as by a crowd.
to sing to a chant, or in the manner of a chant, especially in a church service.
to sing.
to celebrate in song.
to repeat (a phrase, slogan, etc.) rhythmically and insistently.
to sing.
to utter a chant.
noun
a simple song or melody
a short simple melody in which several words or syllables are assigned to one note, as in the recitation of psalms
a psalm or canticle performed by using such a melody
a rhythmic or repetitious slogan, usually spoken or sung, as by sports supporters, etc
monotonous or singsong intonation in speech
verb
to sing or recite (a psalm, prayer, etc) as a chant
to intone (a slogan) rhythmically or repetitiously
to speak or say monotonously as if intoning a chant
v.

late 14c., from Old French chanter “to sing, celebrate” (12c.), from Latin cantare “to sing,” originally frequentative of canere “sing” (which it replaced), from PIE root *kan- “to sing” (cf. Greek eikanos “cock,” Old English hana “cock,” both literally “bird who sings for sunrise;” Old Irish caniaid “sings,” Welsh canu “sing”). The frequentative quality of the word was no longer felt in Latin, and by the time French emerged the word had entirely displaced canere. Related: Chanted; chanting.
n.

1670s, from chant (v.), or else from French chant (12c.), from Latin cantus “song, a singing; bird-song,” from past participle stem of canere.