The title comes from the Latin oblivio/oblivium meaning "to forget," or better, "the condition of being forgotten, unknown."
Astor Piazzolla's (Argentinian) music, originally written for instrumental ensemble, perfectly depicts this rather melancholy mood.
Using carefully selected nonsense syllables, this skilled arranger has given advanced high school, college, and community choirs the opportunity to include this much-loved music in their performances.
Choirs will love performing (and rehearsing!) this one.