swifter; swiftest
1
: happening or done quickly or immediately
a swift and accurate response
a swift kick
2
: moving or able to move very fast
a swift horse/runner
a swift river current
3
US, informal
: smart or intelligent
—usually used in negative statements
She's a nice kid, but she's not too swift.
"I locked myself out of my car." "That wasn't very swift."
Cite this Entry
“Swift.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/swift. Accessed 19 Jun. 2026.
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