adv slackly; as, slack dried hops.
2. slack ·noun a valley, or small, shallow dell.
3. slack ·noun small coal; also, coal dust; culm.
4. slack ·superl weak; not holding fast; as, a slack hand.
5. slack ·adj ·alt. of slacken.
6. slack ·vt ·alt. of slacken.
7. slack ·superl lax; not tense; not hard drawn; not firmly extended; as, a slack rope.
8. slack ·superl not violent, rapid, or pressing; slow; moderate; easy; as, business is slack.
9. slack ·noun the part of anything that hangs loose, having no strain upon it; as, the slack of a rope or of a sail.
10. slack ·superl remiss; backward; not using due diligence or care; not earnest or eager; as, slack in duty or service.