at once
phrase
1
as in concurrently
at one and the same time
I have three papers due all at once.
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Antonyms & Near Antonyms
2
as in now
without delay
Call me at once when you get this message.
Synonyms & Similar Words
Antonyms & Near Antonyms
Cite this Entry
“At once.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/at%20once. Accessed 13 Jan. 2026.
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