1. plural of tail; the hindmost parts of animals
2. formal evening dress for men, including a tailcoat
Usage: formal

1. a call made when a coin lands with the reverse side up

Examples

• The dogs wagged their tails excitedly.
• Several cats were chasing their own tails in the yard.
• The groom wore white tie and tails to the wedding.
• He rented tails for the formal dinner.
• She called tails before the coin toss.
• Heads or tails?
• The coin came up tails three times in a row.