1. small Arctic rodents with short tails and furry feet, known for their population cycles
2. people who follow others blindly or unthinkingly, especially into dangerous situations
Usage: figurative

Examples

• Lemmings are found throughout the Arctic tundra.
• The lemming population fluctuates dramatically every few years.
• Scientists study lemmings to understand Arctic ecosystems.
• Don’t be lemmings – think for yourselves before making this decision.
• The investors acted like lemmings, all rushing to sell at once.
• She refused to follow the crowd like lemmings over a cliff.
• The myth that lemmings commit mass suicide has been debunked.