live for

live for (someone or something)

1. To live solely to help or support someone or something or to do a particular thing. I know you live for your kids, but it's important for them to see that you have your own interests. It's like you live for your work—don't you ever take a day off?
2. To be known for being particularly excited about something. A: "I'm just not hungry." B: "But you live for pizza night! Are you not feeling well?"
See also: for, live
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

live for someone or something

1. to exist for the benefit of someone or something. She just lives for her children. Roger lives for his work.
2. to exist to enjoy someone or something. She lives for her vacations in Acapulco.
See also: for, live
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

live for

To be enthusiastic about something: He lives for mountain climbing.
See also: for, live
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also:
References in classic literature ?
Here people understood that a man is in duty bound to live for himself, as every man of culture should live.
To live for myself avoiding those two evils is my whole philosophy now."
(Pierre's modesty made him correct himself) "to live for others, only now have I understood all the happiness of life.
Because the live oak can live for such a long time, it is very important that it develops a proper trunk and branch structure early on.
Noting the dramatic differences in life span among various animals--a mouse may last for 2 years while a bat can live for half a century--Kenyon has become convinced that longevity has evolved in animals many times.
Roth's experiment is the first of its kind, perhaps because other scientist may have been nagged by the fact that a monkey can live for 40 years, and publishor-perish circles of scientific inquiry do not promote 50-year experiments.