- Lasting forever, or for an indefinitely long time
- Set up to be in effect or have tenure for an unlimited duration
- Continuing uninterrupted
- Flowering throughout the growing season
- By means of artificial hybridization, practised for a series of years, he has succeeded in producing a race of carnations which are perpetual bloomers.
- The hybrid perpetual roses as a rule require to be pruned to within 4 to 6 inches of the ground.
abiding, age-long, aged, ageless, all-comprehensive, all-inclusive, all-knowing, all-powerful, all-seeing, all-wise, almighty, ancient, antique, boundless, ceaseless, changeless, chattering, chronic, coeternal, constant, continual, continuing, continuous, countless, creating, creative, dateless, diuturnal, durable, endless, enduring, eternal, eternally the same, eterne, ever-being, ever-durable, ever-during, evergreen, everlasting, everliving, exhaustless, extending everywhere, firm, fixed, frozen, glorious, good, hallowed, hardy, highest, holy, illimitable, illimited, immeasurable, immemorial, immense, immobile, immortal, immutable, incalculable, incessant, incomprehensible, indestructible, inexhaustible, infinite, infinitely continuous, innumerable, intact, interminable, interminate, intransient, invariable, inveterate, inviolate, just, lasting, limitless, long-lasting, long-lived, long-standing, long-term, longeval, longevous, loving, luminous, machine gun, macrobiotic, majestic, making, measureless, merciful, never-ceasing, never-ending, no end of, nonstop, nonterminating, nonterminous, numinous, of long duration, of long standing, olamic, omnipotent, omnipresent, omniscient, one, oscillating, perdurable, perduring, perennial, permanent, persistent, persisting, pulsating, quiescent, radiant, rapid, recurrent, regular, remaining, repeated, repetitive, rigid, sacred, sempervirent, sempiternal, shaping, shoreless, solid, sovereign, stable, staccato, static, stationary, staying, steadfast, steady, stuttering, sumless, supreme, sustained, termless, timeless, torpid, tough, ubiquitous, unaltered, unbounded, unbroken, unceasing, unchangeable, unchanged, unchanging, unchecked, uncircumscribed, undefined, undestroyed, undeviating, unending, unfading, unfailing, unfathomable, unintermitted, unintermittent, unintermitting, uninterrupted, universal, unlimited, unmeasurable, unmeasured, unnumbered, unplumbed, unremitting, unshifting, unstopped, untold, unvaried, unvarying, vibrating, vital, without bound, without end, without limit, without measure, without number
From the Latin word 'perpetualis' (universal) 
- The translations below need to be checked.