1. a small rodent with a short tail that lives in northern regions and is known for periodic mass migrations
2. a person who follows others without thinking independently, especially in a dangerous or foolish way
Usage: figurative

Examples

• The Arctic lemming is well adapted to cold climates.
• Lemmings are important prey animals for Arctic foxes and owls.
• During population peaks, lemmings may migrate in large numbers.
• The myth that lemmings commit mass suicide is false.
• Don’t be a lemming – think for yourself before making decisions.
• The investors acted like lemmings, all rushing to sell at once.
• She refused to be a lemming and questioned the popular opinion.