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1. Thoroughgoing; out-and-out: a dyed-in-the-wool populist.
2. Dyed before being woven into cloth.
1. extreme or unchanging in attitude, opinion, etc
2. (Textiles) (of a fabric) made of dyed yarn
1. through and through; complete: a dyed-in-the-wool feminist.
2. dyed before weaving.
Out-and-out or thoroughgoing; from the dyeing of wool before it is made into cloth, thus fixing the color more firmly and uniformly.