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Webster 1913 Edition

Adj.

Consisting of two thicknesses, as cloth; double.

Woven double, as cloth or carpeting, by incorporating two sets of warp thread and two of weft.

two-ply ‎(not comparable)

Consisting of two layers or two strands.
(textile fabrics) Consisting of two webs woven into one another.
two-ply carpet
(manufactured articles, linen) Consisting of two thicknesses.
two-ply collar/two-ply cuff