Sell also: formerly
• Adv: on one occasion; example: "once I ran into her"
• Adv: as soon as; example: "once we are home, we can rest"
• Adv: at a previous time; examples: "at one time he loved her", "her erstwhile writing", "she was a dancer once""
Multitasking? I can't even do two things at once. I can't even do one thing at once.
It is the city of mirrors, the city of mirages, at once solid and liquid, at once air and stone.
It isn't true that you live only once. You only die once. You live lots of times, if you know how.