,noun, adjective, verb, tinned, tin⋅ning.| 1. | Chemistry. a low-melting, malleable, ductile metallic element nearly approaching silver in color and luster: used in plating and in making alloys, tinfoil, and soft solders. Symbol: Sn; atomic weight: 118.69; atomic number: 50; specific gravity: 7.31 at 20°C. |
| 2. | tin plate. |
| 3. | any shallow pan, esp. one used in baking. |
| 4. | any pot, box, can, or other container or vessel made of tin or tin plate. |
| 5. | Squash. telltale (def. 8). |
| 6. | Chiefly British. a hermetically sealed can containing food. |
| 7. | Slang. a small quantity of an illicit drug, esp. from two to five grams of cocaine: usually sold in a small plastic bag, a glassine envelope, or often a small tin container. |
| 8. | British Slang. money. |
| 9. | made or consisting of tin or tin plate. |
| 10. | false; worthless; counterfeit: a set of tin values. |
| 11. | indicating the tenth event of a series, as a wedding anniversary. |
| 12. | Metallurgy.
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| 13. | Chiefly British. to preserve or pack (esp. food) in cans; can. |
| 14. | to cover (windows and doors in an abandoned or unoccupied building or apartment) with sheets of tin to prevent vandalism or occupancy by vagrants, squatters, etc. |

tin (tĭn)
n.
Symbol Sn
A malleable metallic element used to coat other metals to prevent corrosion. Atomic number 50; atomic weight 118.71; melting point 231.89°C; boiling point 2,602°C; specific gravity 7.31; valence 2, 4.
| tin (tĭn) Pronunciation Key
Symbol Sn A malleable, silvery metallic element that occurs in igneous rocks. It has a crystalline structure and crackles when bent. Tin is used as an anticorrosion agent and is a part of numerous alloys, including bronze. Atomic number 50; atomic weight 118.71; melting point 231.89°C; boiling point 2,270°C; specific gravity 7.31; valence 2, 4. See Periodic Table. See Note at element. |