1) A tuft or waste piece of wool, or a material made of such wool.
1377-8 Pro iij lib flockes emptis per eundem iijd, Bolton Priory
1466-8 ‘For 21 lb of flocks ... for making of blare’, Hull
1533 Names of those who make woollen cloths with woof called flock, West Riding
1560 xix stone of woell and a stone of flockes, Kendal.