NounSimultaneity (countable and uncountable; plural simultaneities)
- The quality or state of being simultaneous; simultaneousness.
- (music) More than one complete musical texture occurring at the same time. This first appeared in the music of Charles Ives, and is common in the music of Conlon Nancarrow, and others.
accompaniment, accordance, agreement, alliance, association, cahoots, co-occurrence, co-working, coaction, coincidence, collaboration, collectivity, collusion, combination, combined effort, concert, concerted action, concomitance, concomitancy, concordance, concourse, concurrence, confluence, conjunction, consilience, conspiracy, cooperation, correspondence, immediacy, immediateness, instantaneity, instantaneousness, junction, momentaneousness, momentariness, parallelism, parasitism, saprophytism, symbiosis, synchronism, synergy, togetherness, union, united action, withness