Tardy superl. : Moving with a slow pace or motion; slow; not swift.

Tardy superl. : Not being inseason; late; dilatory; -- opposed to prompt; as, to be tardy in one's payments.

Tardy superl. : Unwary; unready.

Tardy superl. : Criminal; guilty.

Tardy v. t. : To make tardy.

Example:
What are some creative ideas to punish Tardy students?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, tär, Webster Online Dictionary with audio pronunciations, Vulgar Latin, adjective, glossary, english, language, ESL, dy, Inflected, Etymology, alteration, Anglo-French, tardus.

Defination from the web:
tardy from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... <the tardy pace at which she was obliged to walk — Charles Dickens> 2 : delayed beyond the expected or proper time : late <a tardy arrival> ...