long-standing

British  

adjective

1. existing or in effect for a long time

---

Example Sentences

Novartis said the acquisition builds on its long-standing presence in allergic disease.

From The Wall Street Journal

This idea echoes a long-standing hypothesis in sleep research -- and even in classical psychoanalysis -- that dreams may act as "guardians of sleep."

From Science Daily

"The BBC understood his decision, and he remains grateful for their support and his long-standing relationship with the broadcaster."

From BBC

That would split the stadium from the club, and as Old Trafford is used as collateral for the current long-standing debt, how that would work is not clear either.

From BBC

Recent advances in supercomputing have allowed scientists to tackle a long-standing question in astronomy.

From Science Daily