well-established

[ wel-i-stab-lisht ]

/ ˈwɛl ɪˈstæb lɪʃt /

permanently founded; settled; firmly set: a well-established business; a well-established habit.

Origin of well-established

First recorded in 1700–10

The steady, entrancing rhythms are a well-established motif in dramatizations of the American war in Vietnam.

A Different Kind of Vietnam Story |J.T. Price |October 9, 2014 |DAILY BEAST
Studies that confirm a large body of well-established findings are more likely to be sound, but they also make for lousier news.

How to Tell When a Scientific Study Is Total B.S. |Russell Saunders |August 22, 2014 |DAILY BEAST
But the risks of going to Thailand were well-established prior to the Gammy case.

The Wild, Wild West of Thai Surrogacy |Emily Shire |August 7, 2014 |DAILY BEAST
They hold funerals for their deceased and have well-established mourning rituals.

A World Without Elephants? Blame China |Michael Tomasky |August 6, 2014 |DAILY BEAST

The best new show of the year, which ended as spectacularly as it began, was unable to crack a well-established drama field.

Emmy Nomination Surprises and Snubs: ‘House of Cards,’ ‘Orphan Black,’ and More |Jason Lynch |July 18, 2013 |DAILY BEAST
He speaks of "the yearly meeting" as though it were a well-established institution.

George Fox |George Fox
Adults, which may have well-established home territories, may be less likely to attempt such a movement.

The Avifauna of Micronesia, Volume 3 |Rollin H. Baker
Behold these well-established claims to the respect and affection of their descendants!

The Origins of Contemporary France, Volume 1 (of 6) |Hippolyte A. Taine
Well-established specimens have a shrub-like effect, being nearly 2ft.

Hardy Perennials and Old Fashioned Flowers |John Wood
DeLancy confessed; in fact, confession was a pleasant and well-established habit with him.

Making Money |Owen Johnson

well-established

having permanence or security in a certain place, condition, job, etc a well-established brand

well-known or validated a well-established fact