1. An identifying label attached to an item or individual which provides basic information: On clothes, tags usually indicate the brand, size of the garment, fabrics used, and the washing instructions.
2. A rude, unwelcome name or label: Dorothy didn't appreciate the tag of "lazy" that her supervisor used regarding her work.
3. Marks or designs that have been sprayed on a surface as part of graffiti: The teenagers were arrested for spraying tags on business and public buildings.
4. Programming language that provides for the sorting of information that is being loaded into the computer to indicate what should be displayed on the screen: Tags are the basic formatting tool used in HTML (hypertext markup language) and other markup languages; such as, XML.

1. To provide identifying information on a small piece of material attached to something: All of the items in the store were tagged with printed price labels.
2. To write or to issue a piece of paper on a motor vehicle indicating parking or traffic violations: The traffic officer tagged the car that was parked beyond the time limit.
3. To mark or to vandalize a surface of walls, etc. with graffiti: The man was caught and arrested for tagging several business walls and windows in town.

Some students tagged the walls of the local high school.

4. To follow someone around: Harry's little daughter tagged after him everywhere he went in the morning and even insisted on tagging along with him when he went shopping.