The hind appendage of an animal.

A trailing or projecting part resembling a tail.

The rear or last part of something; the closing phase.

The rear structure of an aircraft; the empennage.

The visible stream of dust and gas from a comet.

The reverse side of a coin; the side without the head.

A person who secretly follows someone; a surveillant.

The descending stroke or lower loop of a letter.

The extreme end of a distribution; the long tail.

All terms of a sequence from a given index onward.

To follow and observe someone secretly.

To trail behind or hang on like a tail.