calling card

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a card that is used instead of cash to make telephone calls
• Syn:
phone card
• Hypernyms:
credit card, charge card, charge plate, plastic
2. a printed or written greeting that is left to indicate that you have visited
• Syn:
visiting card, card
• Hypernyms:
greeting, salutation
3. a distinguishing characteristic or behavior
- bombs are a terrorist's calling cards
• Hypernyms:
peculiarity, distinctive feature, distinguishing characteristic