1. to come between two things or events in time or space
2. to become involved in a situation in order to help resolve a problem or conflict
3. to interrupt or interfere with something in progress

Examples

• The teacher intervenes when students argue in class.
• Several years intervened between his first and second novels.
• The government intervenes in the economy during crises.
• She intervenes whenever her children fight.
• A long winter intervenes between autumn and spring.
• The referee intervenes to stop the fight.
• Nothing intervenes between the house and the ocean.