at once

at oncephrase

UK/ət ˈwʌns/US/ət ˈwʌns/

1
NOW
B1immediately; without waiting
- Come here at once!
- She recognised him at once.
2
TOGETHER
B1at the same time
- I can't do two things at once.

at once — nghĩa, phát âm và ví dụ | Từ điển Anh – Anh · Study Today