The phrase "a lifetime of commitment" is correct and usable in written English.
You can use it to describe a long-term dedication or promise, often in the context of relationships, careers, or personal goals.
Example: "Their marriage was built on a lifetime of commitment, filled with love and mutual support."
Alternatives: "a lifelong dedication" or "an enduring commitment."
The think-tank Owen is setting up is strictly for people "whose hallmark is a lifetime of commitment to the European Union".
Though a mutual Monica Morris does not guarantee a lifetime of commitment and love, for now Jeff and I were somehow home, linked by a shared history that was too impossible to ignore.
Discovering your True North takes a lifetime of commitment and learning, but its rewards are unlimited.
It is not enough to be deeply loved, as you must also reciprocate profound love before a lifetime of commitment can be made.
Someone who wants a successful marriage cannot promise a lifetime of commitment to someone they purport to love while plotting an escape at the same time.
Jack had a long and brilliant legal career and a lifetime of passionate commitment to progressive political causes.
I also had made the mistake of taking on responsibility for my son's high school band jazz website (on the misguided assumption that, after a lifetime of avoiding any commitment to volunteering in any way at all, it was time for me to "give back" to the musical organization that had given so much to my son).
The officers, Board of Directors, and staff of UJA-Federation of New York mourn the passing of Norman Levy, a respected leader and cherished friend whose lifetime of commitment included a deep devotion to the Jewish community, the arts, and educational concerns.
We felt it was a great time to honor his body of work and lifetime of commitment to making beautiful, humanistic, deeply "dancerly" dances.
Liza Minnelli earned her ovations with her lifetime of commitment and one night of sweltering, spot-on perfection.
Her unwavering commitment to a lifetime of public service, her tenacity and courage, and her international standing in the world overshadow the "warm and brilliant smile" attributed to Senator Obama by Bob Herbert in his Feb. 23 column.
