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| 1. | one of the horny structures forming the principal covering of birds, consisting typically of a hard, tubular portion attached to the body and tapering into a thinner, stemlike portion bearing a series of slender, barbed processes that interlock to form a flat structure on each side. |
| 2. | kind; character; nature: two boys of the same feather. |
| 3. | something like a feather, as a tuft or fringe of hair. |
| 4. | something very light, small, or trivial: Your worry is a mere feather. |
| 5. | Archery. one of the vanes at the tail of an arrow or dart. |
| 6. | Carpentry. a spline for joining the grooved edges of two boards. |
| 7. | Masonry. See under plug and feathers. |
| 8. | a featherlike flaw, esp. in a precious stone. |
| 9. | Machinery. feather key. |
| 10. | Archaic. attire. |
| 11. | Obsolete. plumage. |
| 12. | to provide with feathers, as an arrow. |
| 13. | to clothe or cover with or as with feathers. |
| 14. | Rowing. to turn (an oar) after a stroke so that the blade becomes nearly horizontal, and hold it thus as it is moved back into position for the next stroke. |
| 15. | Aeronautics.
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| 16. | to grow feathers. |
| 17. | to be or become feathery in appearance. |
| 18. | to move like feathers. |
| 19. | Rowing. to feather an oar. |
| 20. | feather into, South Midland U.S. to attack (a person, task, or problem) vigorously. |
| 21. | a feather in one's cap, a praiseworthy accomplishment; distinction; honor: Being chosen class president is a feather in her cap. |
| 22. | birds of a feather. bird (def. 15). |
| 23. | feather one's nest, to take advantage of the opportunities to enrich oneself: The mayor had used his term of office to feather his nest. |
| 24. | in fine or high feather, in good form, humor, or health: feeling in fine feather. |
| 25. | ruffle someone's feathers, to anger, upset, or annoy (another person). |
| 26. | smooth one's ruffled or rumpled feathers, to regain one's composure; become calm: After the argument, we each retired to our own rooms to smooth our ruffled feathers. |

| an apparatus for splitting stone, consisting of two tapered bars (feathers), inserted into a hole drilled into the stone, between which a narrow wedge (plug) is hammered to spread them. |
