the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the bodythe time of the last part of something; "the fag end of this crisis-ridden century" "the tail of the storm"
any projection that resembles the tail of an animalthe fleshy part of the human body that you sit on; "he deserves a good kick in the butt" "are you going to sit on your fanny and do nothing?"
a spy employed to follow someone and report their movements(usually plural) the reverse side of a coin that does not bear the representation of a person's headthe rear part of an aircraftthe rear part of a ship