SLACK'NESS, noun

1. Looseness; the state opposite to tension; not tightness or rigidness; as the slackness of a cord or rope.

2. Remissness; negligence; inattention; as the slackness of men in business or duty; slackness in the performance of engagements.

3. Slowness; tardiness; want of tendency; as the slackness of flesh to heal.

4. Weakness; not intenseness.