A person who is addicted to working, to the point where their life consists only of work and sleep. They have very few friends, if any, and some rarely see their own families.
Workaholics often suffer from fatigue, sleeping disorders, stress and stress-related ailments, and some eventually work themselves to death. Workaholics are a common sight in some East Asian countries, but are less prevalent in North America and even less in Europe.

A person who works too hard, even when they are meant to be on vacation.

a person who makes their job their entire life

A person who's sole self purpose in life is to work hard and achieve until the day they die, never stopping to enjoy their achievments or see the world around them. Everything comes second to work and because of this their friendships are torn and love life is darker than the dark side of the moon

One who is addicted to workahol

Basicly a person with no life, so they decide to try and fill the gap of having no life by working ALL THE TIME. This generally does not work and people who turn into workaholics are usually unmarried over-ambitious women and over-ambitious men

A term givin to a spouse (negative in connotation) describing their lack of attention given to their marriage and/or family vs. their work.