Meaning of “tails” - Learner’s Dictionary

tails

noun [ plural ] uk us /teɪlz/
COIN

the side of a coin that does not have someone's head on it:

Let's toss a coin - heads or tails?
COAT

a formal coat that has a short front part and a long back part that is divided in two

(Definition of “tails” from the Cambridge Learner’s Dictionary © Cambridge University Press)