1.Definition: (usually plural) the reverse side of a coin that does not bear the representation of a person's head

Category: Objects

2.Definition: a spy employed to follow someone and report their movements

Related Noun(s):shadow, shadower

Category: People

3.Definition: any projection that resembles the tail of an animal

Category: General

4.Definition: the fleshy part of the human body that you sit on

Related Noun(s):backside, behind, bottom, buns, buttocks, can, derriere, fundament, hindquarters, keister, nates, posterior, prat, rear, rump, seat, stern, tooshie, tush

Category: General

5.Definition: the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body

Category: Animals

6.Definition: the rear part of a ship

Related Noun(s):quarter, stern

Category: Objects

7.Definition: the rear part of an aircraft

Related Noun(s):empennage

Category: Objects

8.Definition: the time of the last part of something

"The fag end of this crisis-ridden century", "The tail of the storm"

Category: General