Creation of a single yarn by twisting two or more yarns together.

winding two or more yarns together; must be done in the opposite direction to that in which they were spun

spinning singles yarns together to form a plied yarn

The process of twisting two or more strands of yarn or strips of cloth together.

Plying, in textile manufacture, is the activity of twisting, intermingling, or otherwise intimately combining two or more fibers or yarns into a combined yarn or fiber.