[leg] 
noun, verb, legged, leg⋅ging.| 1. | either of the two lower limbs of a biped, as a human being, or any of the paired limbs of an animal, arthropod, etc., that support and move the body. |
| 2. | Anatomy. the lower limb of a human being from the knee to the ankle. |
| 3. | something resembling or suggesting a leg in use, position, or appearance. |
| 4. | the part of a garment that covers the leg: the leg of a stocking; trouser leg. |
| 5. | one of usually several, relatively tall, slender supports for a piece of furniture. |
| 6. | one of the sides of a forked object, as of a compass or pair of dividers. |
| 7. | one of the sides of a triangle other than the base or hypotenuse. |
| 8. | a timber, bar, or the like, serving to prop or shore up a structure. |
| 9. | one of the flanges of an angle iron. |
| 10. | one of the distinct sections of any course: the last leg of a trip. |
| 11. | Nautical.
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| 12. | Sports.
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| 13. | legs, (in wine tasting) the rivulets of wine that slowly descend along the inside of a glass after the wine has been swirled, sometimes regarded as an indication that the wine is full-bodied. |
| 14. | Cricket.
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| 15. | Electricity. a component or branch of a circuit, network, antenna, etc. |
| 16. | Radio and Television. a connecting link between stations in a network, as the microwave relays used in transmitting a show from one geographical area to another. |
| 17. | bride 2 (def. 1). |
| 18. | to move or propel (a boat) with the legs: They legged the boat through the tunnel. |
| 19. | leg up, to help (someone) to mount a horse. |
| 20. | leg it, Informal. to walk rapidly or run: We'd better leg it or we'll be late for class. |
| 21. | leg up,
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| 22. | not have a leg to stand on, to lack a valid or logical basis for one's argument or attitude: Without evidence, the prosecutor doesn't have a leg to stand on. |
| 23. | on one's or its last legs, just short of exhaustion, breakdown, failure, etc.: The aristocracy was on its last legs. |
| 24. | pull someone's leg,
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| 25. | shake a leg, Informal.
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| 26. | stretch one's legs, to take a walk; get some needed exercise after prolonged sitting: He got up during the intermission to stretch his legs. |
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on (one's) last legs
and on its last legs
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leg
leg (lěg)
n.
One of the two lower limbs of the human body, especially the part between the knee and the foot.
A supporting part resembling a leg in shape or function.
on one's last legs
Extremely tired, close to collapsing, as in We've been cleaning house all day and I'm on my last legs. This hyperbolic expression originally meant "close to dying," and in John Ray's 1678 proverb collection it was transferred to being bankrupt. Soon afterward it was applied to the end of one's resources, physical or otherwise. It is sometimes applied to things, as in That furnace is on its last legs.