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Definitions

in perpetuity

ADVERB
ad infinitum
Synonyms
WEAK
at length continuously endlessly forever having no end interminably never-ending on and on perpetually relentlessly unlimitedly without end without limit
ADVERB
forever
Synonyms
STRONGEST
always endlessly eternally permanently
STRONG
evermore perpetually
WEAK
durably enduringly everything considered for always for ever and ever for good for keeps for life forevermore immortally in perpetuum infinitely interminably lastingly now and forever on and on till Doomsday till blue in the face till death do us part till the cows come home till the end of time unchangingly world without end
Antonyms
WEAK
briefly never temporarily

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.

The money was left in perpetuity by the art philanthropist and founder of the travel search engine Cheap Flights, Hugo Burge, who died in 2023 aged just 51.

From BBC • Feb. 6, 2026

Huyghe’s ecosystems are difficult for museums and collectors to display in perpetuity, making “A::Light” a rare exception because it will be free to see and perpetually on view.

From The Wall Street Journal • Jan. 28, 2026

At the time these lands were a part of the Great Sioux Reservation, guaranteed to the Lakotas in perpetuity.

From The Wall Street Journal • Oct. 31, 2025

"I think it is a mistake to assume that we will have high tariffs in perpetuity," said Sen. Ted Cruz, R-Tex.

From Salon • Apr. 10, 2025

It was his job to set the memory in perpetuity.

From "The Marrow Thieves" by Cherie Dimaline

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.