1) Apart from others 2) Individually 3) On an individual basis 4) One at a time 5) One by one 6) Perform a lovely piece solo 7) Separately 8) Severally 1) Apop 2) Each 3) Independently 4) Individually 5) One at a time 6) One by one 7) Separately 8) Solely 
• (adv.) Only; by one`s self; alone. • (adv.) Individually; particularly; severally; as, to make men singly and personally good. • (adv.) Honestly; sincerely; simply. • (adv.) Without partners, companions, or associates; single-handed; as, to attack another singly. • (adv.) Singularly; peculiarly.Singly: words in the defini...
Sin'gly adverb 1. Individually; particularly; severally; as, to make men singly and personally good. 2. Only; by one's self; alone. « Look thee, 't is so! Thou singly honest man.» Shak. 3. Without partners, companions, or associates; singl...
[adv] - one by one
adverb one by one; one at a time; `they were arranged singly`