1. a large group of insects, especially bees, moving together
2. a large crowd of people or things moving together

1. to move in a large group
2. to be filled with a large number of people or things

Examples

• A swarm of bees surrounded the hive.
• Tourists swarmed the popular museum.
• The beach was swarming with people on the holiday weekend.
• Ants swarmed over the dropped ice cream cone.
• A swarm of reporters gathered outside the courthouse.
• The stadium swarmed with excited fans after the victory.
• Mosquitoes swarmed around the campers at dusk.