Definition of skeins:
(n) :
A quantity of thread, yarn, etc., wound on a reel then removed and loosely knotted into an oblong shape; a skein of cotton is formed by eighty turns of thread around a reel with a fifty-four inch diameter.
(n) :
(by extension) A thing resembling a skein (noun etymology 1, sense 1) of thread, yarn, etc.
(n) :
(figurative) A tangle, a weave, a web.
(n) :
(UK, dialectal, ornithology, collective) A group of wildfowl (for example, geese or swans) in flight.
(n) :
(figurative) (sports) A winning streak.
(v) :
To weave or wind (thread, yarn, etc.) into a skein (noun etymology 1, sense 1).