noun, verb, pinned, pin⋅ning.| 1. | a small, slender, often pointed piece of wood, metal, etc., used to fasten, support, or attach things. |
| 2. | a short, slender piece of wire with a point at one end and a head at the other, for fastening things together. |
| 3. | any of various forms of fasteners or ornaments consisting essentially or partly of a pointed or penetrating wire or shaft (often used in combination): a jeweled pin. |
| 4. | a badge having a pointed bar or pin attached, by which it is fastened to the clothing: a fraternity pin. |
| 5. | Machinery.
|
| 6. | the part of a cylindrical key stem entering a lock. |
| 7. | a clothespin. |
| 8. | a hairpin. |
| 9. | rolling pin. |
| 10. | a peg, nail, or stud marking the center of a target. |
| 11. | Bowling. any one of the rounded wooden clubs set up as the target in tenpins, ninepins, duckpins, etc. |
| 12. | Golf. the flag staff which identifies a hole. |
| 13. | any of the projecting knobs or rails on a pinball machine that serve as targets for the ball. |
| 14. | Informal. a human leg. |
| 15. | Music. peg (def. 5). |
| 16. | Wrestling. a fall. |
| 17. | Nautical.
|
| 18. | Carpentry. a tenon in a dovetail joint; dovetail. |
| 19. | a very small amount; a trifle: Such insincere advice isn't worth a pin. |
| 20. | Chess. the immobilization of an enemy piece by attacking with one's queen, rook, or bishop. |
| 21. | Electronics. a pin-shaped connection, as the terminals on the base of an electron tube or the connections on an integrated circuit. |
| 22. | to fasten or attach with or as with a pin or pins: to pin two pieces of cloth together. |
| 23. | to hold fast in a spot or position (sometimes fol. by down): The debris pinned him down. |
| 24. | to transfix or mount with a pin or the like: to pin a flower as a botanical specimen. |
| 25. | Chess. to immobilize (an enemy piece) by placing one's queen, rook, or bishop in a position to check the exposed king or capture a valuable piece if the pinned piece were moved. |
| 26. | Wrestling. to secure a fall over one's opponent. |
| 27. | pin down,
|
| 28. | pin in, to fill (gaps in a rubble wall, etc.) with spalls. |
| 29. | pin up, to make (a piece of masonry) level or plumb with wedges. |
| 30. | get pinned,
|
| 31. | pin something on someone, Informal. to ascribe the blame or guilt for something to a person; show someone to be culpable: They pinned the crime on him. |
| 32. | pull the pin, Informal. to end a relationship, project, program, or the like, because of lack of continuing interest, success, funds, etc. |

pin (so's)
|
pin (pĭn)
n.
A thin rod for securing the ends of fractured bones.
A peg for fixing the crown to the root of a tooth.