1. makes or becomes more tight, firm, or secure
Usage: third person singular present tense of ‘tighten’
2. makes or becomes more strict or severe
Usage: often used with rules, regulations, or control

Examples

• She tightens the screws on the cabinet door.
• The rope tightens as he pulls on it.
• The government tightens security at airports.
• His jaw tightens when he’s angry.
• The company tightens its budget during tough times.
• The belt tightens around his waist.
• The school tightens its dress code policy.