Dictionary > Slacken


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. Whence these raging fires Will slacken, if his breath stir not their flames. (milton)
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. That through your death your lineage should slack. (Chaucer) They will not of that firste purpose slack. (Chaucer)
Origin: Slacked, Slackened; Slacking, Slackening See Slack.
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. Slack not the pressage. (Dryden)
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. Rancor for to slack. I should be grieved, young prince, to think my presence Unbent your thoughts, and slackened ’em to arms. (Addison) In this business of growing rich, poor men should slack their pace. (south) With such delay well plased, they slack their course. (milton)
5. To cause to become less intense; to mitigate; to abate; to ease. To respite, or deceive, or slack thy pain Of this ill mansion. (milton) air-slacked lime, lime slacked by exposure to the air, in consequence of the absorption of carton dioxide and water, by which it is converted into carbonate of lime and hydrate of lime.
(Science: chemistry) A spongy, semivitrifled substance which miners or smelters mix with the ores of metals to prevent their fusion.
Alternative forms: slakin.

You will also like...

Pikas are an indicator species for climate change
Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

An artistic depiction of a human embryo
Growth and Development of a Human Baby

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Plant biology
Plant Biology

Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

New Zealand - Biodiversity fauna
New Zealand’s Biodiversity

Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..


The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

Regulation of Biological Systems
Regulation of Biological Systems

Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..