(colloquial) Someone who has completed or accomplished many tasks or works.

plural of busy little beaver

(mathematics, computing theory) The mathematical function that maps each positive integer n to the number of steps required for the busy beaver among machines with two colors and n states to terminate.

A man in business, one who works at a commercial institution.

A woman involved in business.

Methodical and efficient, in a way that would be advantageous to a business or businessperson. / Earnest and practical without being distracted or enthusiastic.

plural of businessman

A person in business, or one who works at a commercial institution.

plural of businessperson

plural of businesswoman