Longman Dictionary of Contemporary English homepage

Language: Old English
Origin:

swift

1 adjective
     
swift1
1 happening or done quickly and immediately:
My letter received a swift reply.
She shot a swift glance at Paul.
swift to do something
They were swift to deny the accusations.
2 [only before noun] moving, or able to move, very fast:
a swift runner
She wiped her tears away in one swift movement.
3

somebody is not too swift

American English spoken used to say that someone is not very intelligent
—swiftly adverb:
Alice dressed swiftly.
—swiftness noun [uncountable]
WORD FOCUS: fast WORD FOCUS: fast
moving very quickly: at high speed, like lightning, at top speed, flat out
doing something quickly: quick, rapid, swift, prompt, speedy
happening quickly: rapid, speedy, meteoric, at an alarming rate, in no time

➔ See also fast
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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