Slacks vs. Trousers

Not tense or taut; loose

An article of clothing that covers the part of the body between the waist and the ankles or knees, and is divided into a separate part for each leg.

Lacking in activity; not busy

A garment worn by men and boys, extending from the waist to the knee or to the ankle, and covering each leg separately.

Moving slowly; sluggish

(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately;

Lacking in diligence or due care or concern; negligent

Flowing or blowing with little speed

(Linguistics) Pronounced with the muscles of the tongue and jaw relatively relaxed; lax.

To make looser or less taut

To make slower

To be careless or remiss in doing

To slake (lime).

To be or become slack.

To be inactive or avoid work

A loose part, as of a rope or sail

A period of little activity; a lull

A cessation of movement in a current of air or water.

An area of still water.

Unused capacity

Slacks Casual pants that are not part of a suit.

A mixture of coal fragments, coal dust, and dirt that remains after screening coal.

A small dell or hollow.

A bog; a morass.

In a slack manner

Plural of slack

(dated) Semi-formal trousers which are less formal than those that are part of a suit but nowadays are considered suitable casualwear in most offices. (Takes a plural verb even when referring to a single pair; may be referred to as a pair of slacks.)

(usually in the plural) pants for casual wear