What does "knitting" mean?

Knitting: Union formed by knitting, as of bones. Knitting machine, one of a number of contrivances for mechanically knitting stockings, jerseys, and the like. -- Knitting , a stiff rod, as of steel wire, with rounded ends for knitting yarn or threads into a fabric, as in stockings. -- Knitting sheath, a sheath to receive the end of a needle in knitting.