1. the rear part of an animal’s body, especially when forming a distinct appendage
2. the rear or final part of something
3. the side of a coin opposite to the head

1. to follow someone secretly or persistently
2. to become gradually smaller, weaker, or less
Usage: often used with ‘off’

Examples

• The dog wagged its tail happily.
• She stood at the tail of the line waiting to buy tickets.
• The coin landed on tails.
• The detective decided to tail the suspect.
• The storm’s intensity began to tail off by evening.
• The plane’s tail was painted bright red.
• Traffic tailed back for miles on the highway.