1. In music, an indication of tempo that is to be played slowly, at ease, and leisurely: Adgio was the word at the beginning of the second movement which indicated that it should be played slowly.
2. A slow ballet dance in which the female partner is supported or lifted while she holds various poses.: An adagio is a male-female duet dance that shows challenging balance, lifts, and spins.
3. Etymology: Late 17th century from Italian, "at ease".

"Slowly, leisurely" from Italian ad agio, from ad, "to, at" + agio, "leisure"; which came from Vulgar (Common) Latin adjacens, adjacere, "to lie at, to lie near".