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Definitions

well-established

[wel-i-stab-lisht] / ˈwɛl ɪˈstæb lɪʃt /
ADJECTIVE
age-old
Synonyms
STRONGEST
ancient antiquated archaic hoary old-fashioned timeworn
WEAK
aged antediluvian antique old old-time olden venerable vintage
Antonyms
STRONGEST
current modern new young
ADJECTIVE
dyed-in-the-wool
Synonyms
WEAK
absolute complete confirmed congenital deep-down deep-dyed deep-rooted deep-seated deeply ingrained die-hard entrenched fixed full-fledged genuine hardened infixed ingrained instilled long-standing out and out thorough thoroughgoing through-and-through to the core true unchangeable uncompromising utter
ADJECTIVE
established
Synonyms
STRONGEST
entrenched settled traditional
STRONG
fixed ingrained rooted secure set stable vested
WEAK
deep-rooted permanent unshakable
Antonyms
STRONG
indefinite undecided unfixed unstable
WEAK
false insolvent invalidated temporary unsound untrue
ADJECTIVE
genuine
Synonyms
STRONGEST
earnest heartfelt natural positive real sincere true
WEAK
actual artless candid for real frank known open reliable righteous trustworthy undesigning unfeigned unimpeachable unpretended unquestionable up front valid
Antonyms
STRONGEST
dishonest false insincere invalid unreal untrustworthy
WEAK
affected counterfeit deceiving deceptive illegitimate misleading sham
ADJECTIVE
orthodox
Synonyms
WEAK
according to the book acknowledged admitted approved authoritative buttoned-down by the numbers canonical conformist conservative conventional correct customary devout die-hard doctrinal established in line legitimate official old-line pious proper punctilious reactionary received recognized religious right rightful sanctioned sound square standard straight straight arrow traditionalistic true
Antonyms
WEAK
heterodox unconventional unorthodox untraditional
ADJECTIVE
strong
Synonyms
STRONGEST
clear compelling distinct firm unmistakable
STRONG
marked
WEAK
clear-cut convincing formidable great overpowering persuasive redoubtable sharp sound telling trenchant
Antonyms
STRONGEST
dull easy indistinct loose uncertain vague weak
STRONG
indefinite mild
WEAK
low moderate obscure pale unfixed unhealthy
ADJECTIVE
unmannered
Synonyms
WEAK
actual artless candid earnest frank heartfelt hearty honest known natural open positive real reliable righteous sincere true trustworthy unaffected undesigning unfeigned unimpeachable unpretended unquestionable up front valid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

European officials say their countries continue to adhere to well-established agreements over how U.S. bases on their soil can be used, despite Trump’s criticisms.

From The Wall Street Journal • May 8, 2026

The study highlights the growing interest in drug repositioning, which involves finding new uses for existing, well-established compounds.

From Science Daily • May 4, 2026

County — and Torrance in particular — has a well-established reputation as being a relatively gun-friendly area within a more broadly pro-gun-control county and region.

From Los Angeles Times • Apr. 28, 2026

Paclitaxel is a well-established, frontline standard of care for several cancers.

From Barron's • Apr. 27, 2026

By the time Shin crawled through the electric fence, there was a well-established human smuggling network with tentacles that reached deep inside North Korea.

From "Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West" by Blaine Harden