À la fois

Expression: À la fois
Pronunciation: [ah lah fwah]
Meaning: at the same time, at once
Literal translation: at the time
Register: normal
The French expression à la fois means "at the same time," even though the seemingly essential word même is not — indeed, cannot be — included. (See synonyms, below.)

Examples

•    Je ne peux pas lire et écouter de la musique à la fois.
  I can't read and listen to music at the same time.
  
• Ce film est amusant et éducatif à la fois.
  This movie is (both) funny and educational at the same time.
  
• Ne parlez pas tous à la fois, chacun à son tour.
  Don't all speak at once, everyone (will) speak in turn.

Synonyms and Related Expressions

• avoir le don d'ubiquité - to be everywhere at once.
• se dédoubler - to be in two places at once.
• en même temps - at the same time.
• ensemble - together.
• mêner ___ de front - to ___ at the same time, e.g.
  mener deux affaires de front - to run two businesses at the same time.
  mêner plusieurs tâches de front - to perform two tasks at the same time.

Expressions with À ​La Fois

• chasser/courir deux lièvres à la fois
  to try to do two things at once
  (literally, "to chase/run after two hares at the same time")
  
• On ne peut pas être à la fois au four et au moulin. (proverb)
  You can't be in two places at once.
  (literally, "You can't be at the oven and the mill at the same time.")
  
• Nul ne peut servir deux maîtres à la fois. (proverb)
  You can't serve two masters.
  (literally, "No one can serve two masters at the same time.")