[slak] 
| 1. | not tight, taut, firm, or tense; loose: a slack rope. |
| 2. | negligent; careless; remiss: slack proofreading. |
| 3. | slow, sluggish, or indolent: He is slack in answering letters. |
| 4. | not active or busy; dull; not brisk: the slack season in an industry. |
| 5. | moving very slowly, as the tide, wind, or water. |
| 6. | weak; lax. |
| 7. | Nautical. easy (def. 15a). |
| 8. | in a slack manner. |
| 9. | a slack condition or part. |
| 10. | the part of a rope, sail, or the like, that hangs loose, without strain upon it. |
| 11. | a decrease in activity, as in business or work: a sudden slack in output. |
| 12. | a period of decreased activity. |
| 13. | Geography. a cessation in a strong flow, as of a current at its turn. |
| 14. | a depression between hills, in a hillside, or in the land surface. |
| 15. | Prosody. (in sprung rhythm) the unaccented syllable or syllables. |
| 16. | British Dialect. a morass; marshy ground; a hollow or dell with soft, wet ground at the bottom. |
| 17. | to be remiss in respect to (some matter, duty, right, etc.); shirk; leave undone: He slacked the most important part. |
| 18. | to make or allow to become less active, vigorous, intense, etc.; relax (efforts, labor, speed, etc.); lessen; moderate (often fol. by up). |
| 19. | to make loose, or less tense or taut, as a rope; loosen (often fol. by off or out). |
| 20. | to slake (lime). |
| 21. | to be remiss; shirk one's duty or part. |
| 22. | to become less active, vigorous, rapid, etc. (often fol. by up): Business is slacking up. |
| 23. | to become less tense or taut, as a rope; to ease off. |
| 24. | to become slaked, as lime. |
| 25. | take up the slack,
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