noun:

1. A horizontal framing member at the top or bottom of a group of vertical studs.
2. The anode of a vacuum tube.
3. An image or copy.
4. The ability of a travel agent to issue tickets on behalf of a particular airline.
5. Plate armour.
6. The contents of such a dish.
7. A roundel of silver or tinctured argent.
8. Home plate.
9. Any flat piece of material such as coated glass or plastic.
10. A shaped and fitted surface, usually ceramic or metal that fits into the mouth and in which teeth are implanted; a dental plate.
11. Any of various larger scales found in some reptiles.
12. An illustration in a book, either black and white, or colour, usually on a page of paper of different quality from the text pages.
13. Skins for fur linings of garments, sewn together and roughly shaped, but not finally cut or fitted.
14. The fine nap (as of beaver, musquash, etc.) on a hat whose body is made from inferior material.
15. A record, usually vinyl.
16. A weighted disk, usually of metal, with a hole in the center for use with a barbell, dumbbell, or exercise machine.
17. A very light steel horseshoe for racehorses.
18. One of the thin parts of the brisket of an animal.
19. A vehicle license plate.
20. A slightly curved but almost flat dish from which food is served or eaten.
21. Precious metal, especially silver.
22. A VIN plate, particularly with regard to the car's year of manufacture.
23. A flat metallic object of uniform thickness.
24. Silver or gold, in the form of a coin, or less often silver or gold utensils or dishes (from Spanish plata (“silver")).
25. A decorative or food service item coated with silver or gold.
26. A taxi permit, especially of a metal disc.
27. A prize given to the winner in a contest.
28. A metallic card, used to imprint tickets with an airline's logo, name, and numeric code.
29. A layer of a material on the surface of something, usually qualified by the type of the material; plating.
30. A flat electrode such as can be found in an accumulator battery, or in an electrolysis tank.
31. A course at a meal.
32. An agenda of tasks, problems, or responsibilities.
33. An engraved surface used to transfer an image to paper.
34. A tectonic plate.
35. A foot, from "plates of meat".
36. A material covered with such a layer.
37. Such dishes collectively.

verb:

1. To beat into thin plates.
2. To arm or defend with metal plates.
3. To place the various elements of a meal on the diner's plate prior to serving.
4. To score a run.
5. (particularly with early British stamps) to identify the printing plate used.
6. To categorise stamps based on their position on the original sheet, in order to reconstruct an entire sheet.
7. To specify which airline a ticket will be issued on behalf of.
8. To cover the surface material of an object with a thin coat of another material, usually a metal.

name:

1. The River Plate.