DICT.TW Dictionary Taiwan

 Slack, a. [Compar. Slacker superl. Slackest.]  Lax; not tense; not hard drawn; not firmly extended; as, a slack rope.
 2. Weak; not holding fast; as, a slack hand.
 3. Remiss; backward; not using due diligence or care; not earnest or eager; as, slack in duty or service.
    The Lord is not slack concerning his promise, as some men count slackness.   --2 Pet. iii. 9.
 4. Not violent, rapid, or pressing; slow; moderate; easy; as, business is slack. “With slack pace.”
    C░sar . . . about sunset, hoisting sail with a slack southwest, at midnight was becalmed.   --Milton.
 Slack in stays Naut., slow in going about, as a ship.
 Slack water, the time when the tide runs slowly, or the water is at rest; or the interval between the flux and reflux of the tide.
 Slack-water navigation, navigation in a stream the depth of which has been increased, and the current diminished, by a dam or dams.
 Syn: -- Loose; relaxed; weak; remiss; backward; abated; diminished; inactive; slow; tardy; dull.