slack

Lax; not tense; not firmly extended.

Lax.

Not active or busy, successful, or violent.

Lacking diligence or care; not earnest or eager.

Excess; surplus to requirements.

Weak; not holding fast.

Moderate in some capacity.

Moderately warm.

Moderate in speed.

(Caribbean, slang) Vulgar; sexually explicit, especially in dancehall music.

The part of anything that hangs loose, having no strain upon it.

Small coal; coal dust.

[before a noun] Attributive form of slacks (“semi-formal trousers”).

A dip in a surface.

In particular, a shallow dell or hollow; a dip in the surface of terrain, such as between hills.

A valley, or small, shallow dell; a sag or saddle in a ridge.

A flat-bottomed, hollow zone within a sand-dune system that has developed over impervious strata, sometimes due to erosion or blow-out of the dune system; its flat base level is therefore close to or at the permanent water-table level, and therefore has rich, marshy flora, with Salix species (willows) as typical woody colonisers.

A temporary speed restriction where track maintenance or engineering work is being carried out at a particular place.

A low-lying marsh or a pool, especially a tidal or intermittent one which periodically fills and drains.

Unconditional listening attention given by client to patient.

To slacken.

To refuse to work as hard as one is supposed to.

To lose cohesion or solidity by a chemical combination with water; to slake.

(no longer used) To mitigate; to reduce the strength of.

Slackly.