0 past simple and past participle of tighten --
1 to become tighter or to make something become tighter, firmer, or less easy to move: --
As a principle, the abdomen should not be tightened when preparing to breathe, and her attention was directed towards this.
Following this logic, national service requirements for university students have been tightened in different ways from 2002 onwards.
In addition, it tightened the eligibility requirements for disability and survivor's pensions and reduced the benefits available for widows.
In the course of time the definition of the child care guarantee was tightened.
The government progressively tightened up the conscription process to stamp out such fraud.
In 1993, the environmental standards for some air pollutants such as sulfur dioxide and carbon monoxide were tightened.
This was a sign of tightened administration, since assessment delays the assignment of participants to activities.
However, it is precisely this flexibility which will be increasingly difficult to achieve as immigration rules are further tightened.
