verb, plied, ply⋅ing.| 1. | to work with or at diligently; employ busily; use: to ply the needle. |
| 2. | to carry on, practice, or pursue busily or steadily: to ply a trade. |
| 3. | to treat with or apply to (something) repeatedly (often fol. by with): to ply a fire with fresh fuel. |
| 4. | to assail persistently: to ply horses with a whip. |
| 5. | to supply with or offer something pressingly to: to ply a person with drink. |
| 6. | to address (someone) persistently or importunately, as with questions, solicitations, etc.; importune. |
| 7. | to pass over or along (a river, stream, etc.) steadily or on a regular basis: boats that ply the Mississippi. |
| 8. | to run or travel regularly over a fixed course or between certain places, as a boat, bus, etc. |
| 9. | to perform one's work or office busily or steadily: to ply with the oars; to ply at a trade. |
noun, plural plies, verb, plied, ply⋅ing.| 1. | a thickness or layer. |
| 2. | Automotive. a layer of reinforcing fabric for a tire. |
| 3. | a unit of yarn: single ply. |
| 4. | one of the sheets of veneer that are glued together to make plywood. |
| 5. | Informal. plywood. |
| 6. | bent, bias, or inclination. |
| 7. | British Dialect. to bend, fold, or mold. |
| 8. | Obsolete. to bend, incline, or yield. |

ply 2 (plī) v. plied (plīd), ply·ing, plies (plīz) v. tr.
[Middle English plien, from applien, to apply; see apply.] |