1. the power or right to give orders, make decisions, and enforce obedience
2. a person or organization having power or control in a particular area
3. the power to influence others based on recognized knowledge or expertise

Examples

• The principal has the authority to suspend students.
• Local authorities are investigating the incident.
• She spoke with authority on the subject of climate change.
• The dictionary is considered the ultimate authority on spelling.
• Parents have authority over their minor children.
• The health authorities issued new guidelines.
• He questioned the teacher’s authority in the classroom.