What is the meaning of ply?

noun

• One of the strands twisted together to make yarn or rope or thread; often used in combination.
  • usage: "three-ply cord"; "four-ply yarn"
• Usually in combinations. ( one of several layers of cloth or paper or wood as in plywood)

verb

• Give what is desired or needed, especially support, food or sustenance.
  • usage: "The hostess provided lunch for all the guests"
  • synonyms: provide, supply, cater
• Apply oneself diligently.
  • usage: "Ply one's trade"
• Travel a route regularly.
  • usage: "Ships ply the waters near the coast"
  • synonyms: run
• Join together as by twisting, weaving, or molding.
  • usage: "ply fabric"
• Wield vigorously.
  • usage: "ply an axe"
• Use diligently.
  • usage: "ply your wits"