1) To become slack; to be made less tense, firm, or rigid; to decrease in tension; as, a wet cord slackens in dry weather.

2) To be remiss or backward; to be negligent.

3) To lose cohesion or solidity by a chemical combination with water; to slake; as, lime slacks.

4) To abate; to become less violent.

5) To lose rapidity; to become more slow; as, a current of water slackens.

6) To languish; to fail; to flag.

7) To end; to cease; to desist; to slake.


1) A spongy, semivitrifled substance which miners or smelters mix with the ores of metals to prevent their fusion.

v. t.

1) To render slack; to make less tense or firm; as, to slack a rope; to slacken a bandage.

2) To neglect; to be remiss in.

3) To deprive of cohesion by combining chemically with water; to slake; as, to slack lime.

4) To cause to become less eager; to repress; to make slow or less rapid; to retard; as, to slacken pursuit; to slacken industry.

5) To cause to become less intense; to mitigate; to abate; to ease.

Example Sentences for


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