1. (n.) Harmony; agreement; concord; union\.

2. (n.) Identity in pitch; coincidence of sounds proceeding from an equality in the number of vibrations made in a given time by two or more sonorous bodies. Parts played or sung in octaves are also said to be in unison, or in octaves.

3. (n.) A single, unvaried.

4. (n.) Sounding alone.

5. (n.) Sounded alike in pitch; unisonant; unisonous; as, unison passages, in which two or more parts unite in coincident sound.

acclamation accompaniment accord accordance affinity agape agreement agreement of all amity assent attune attunement bonds of harmony brotherly love cantata caritas cement of friendship charity chime chiming choral singing chorus coetaneity coetaneousness coevalneity coevalness coexistence coherence coincidence common assent common consent communion community community of interests compatibility concentus concert concomitance concord concordance concurrence conformance conformation conformity congeniality congruence congruency congruity consensus consensus gentium consensus of opinion consensus omnium consent consentaneity consistency consonance consonancy consonant consort contemporaneity contemporaneousness cooperation correspondence diapason empathy equivalence esprit esprit de corps euphony feeling of identity fellow feeling fellowship frictionlessness general acclamation general agreement general consent general voice glee good vibes good vibrations happy family harmonics harmonious harmony heavy harmony homophony identity in harmony intersection isochronism kinship like-mindedness love madrigal madrigaletto meeting of minds monochord monody mutual understanding mutuality one accord one voice oneness oratorio overlap parallelism peace rapport rapprochement reciprocity same mind self-consistency sharing simultaneity single voice solidarity symmetry sympathy symphony sync synchronism synchronization tally team spirit three-part harmony timing together total agreement tune unanimity unanimousness understanding uniformity union unisonance unity universal agreement