What is the meaning of Tattoo?

An image made in the skin with ink and a needle.

A method of decorating the skin by inserting colored substances under the surface with a sharp instrument (usually a solenoid-driven needle).

To apply a tattoo to (someone or something).

To hit the ball hard, as if to figuratively leave a tattoo on the ball.

A signal played five minutes before taps (lights out).

A signal by drum or bugle ordering soldiers to return to their quarters.

A military display or pageant.

To tap rhythmically on, to drum.

A pony of a certain breed from India.

Source: wiktionary.org