definition of
ply

[1] #1 ply v. [provide, supply, cater] give what is desired or needed, especially support, food or sustenance; "The hostess provided lunch for all the guests". wn

[2] #2 ply n. one of the strands twisted together to make yarn or rope or thread; often used in combination; "three-ply cord"; "four-ply yarn". wn

[3] #3 ply n. (usually in combinations) one of several layers of cloth or paper or wood as in plywood. wn

[4] #4 ply v. apply oneself diligently; "Ply one's trade". wn

[5] #5 ply v. [run] travel a route regularly; "Ships ply the waters near the coast". wn