To complete or finish a piece of knitting.
"She spent the afternoon knitting up the last few rows of the sweater."
To complete a piece of knitting, or for a wound or injury to heal closed.
To finish making something by knitting, or for a cut or sore to heal up and close.
3 meanings, ordered from most common to least. Color-coded by CEFR level.
To complete or finish a piece of knitting.
"She spent the afternoon knitting up the last few rows of the sweater."
Of a wound or injury: to close and heal naturally.
"The small cut on his hand knit up cleanly without needing stitches."
Figuratively, to restore or repair something that is frayed or disordered (especially in literary use).
"Sleep, he hoped, would knit up the exhaustion of a brutal week."
Sleep that knits up the ravell'd sleeve of care.
— William Shakespeare, Macbeth, Act 2, Scene 2
To finish or repair by working yarn upward with needles.
To finish making something by knitting, or for a cut or sore to heal up and close.
Used literally in craft contexts (to finish knitting something) and medically (for tissue to close and heal). Literary use also exists — Shakespeare famously used it in Macbeth to refer to sleep 'knitting up' the sleeve of care. Less commonly used today.
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