Duroply offers the high quality industry standard plywoods in India. Get the Plywood, Blockboard, Veneers, Doors, PVC boards & doors at best prices. Ply means to work steadily at something. If you've got a lemonade stand and you're busy perfecting your recipe and seeking out customers, you're doing a good job of plying your trade. The meaning of PLY is to use or wield diligently. How to use ply in a sentence. Learn the definitions, synonyms, pronunciations, and grammar of the word 'ply' and its variations. Find out how to use 'ply' in different contexts, such as giving food or drink, asking questions, or working a trade.