1. to breed or multiply rapidly; to increase quickly in number
Usage: formal
2. to exist in large numbers; to be crowded or swarming
Usage: formal

Examples

• Bacteria pullulate in warm, moist environments.
• The city’s slums pullulate with desperate families seeking shelter.
• Rumors began to pullulate throughout the small town.
• Weeds pullulate in the abandoned garden every spring.
• The internet pullulates with conspiracy theories.
• Insects pullulate during the humid summer months.