The Collaborative International Dictionary of English v.0.48:

Lasting \Last"ing\, a.
   Existing or continuing a long while; enduring; as, a lasting
   good or evil; a lasting color.
   [1913 Webster]

   Syn: Durable; permanent; undecaying; perpetual; unending.

   Usage: Lasting, Permanent, Durable. Lasting commonly
          means merely continuing in existence; permanent
          carries the idea of continuing in the same state,
          position, or course; durable means lasting in spite of
          agencies which tend to destroy.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lasting \Last"ing\, n.
   1. Continuance; endurance. --Locke.
      [1913 Webster]

   2. A species of very durable woolen stuff, used for women's
      shoes; everlasting.
      [1913 Webster]

   3. The act or process of shaping on a last.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Last \Last\, v. i. [imp. & p. p. Lasted; p. pr. & vb. n.
   Lasting.] [OE. lasten, As. l[ae]stan to perform, execute,
   follow, last, continue, fr. l[=a]st, l[=ae]st, trace,
   footstep, course; akin to G. leisten to perform, Goth.
   laistjan to follow. See Last mold of the foot.]
   1. To continue in time; to endure; to remain in existence.
      [1913 Webster]

            [I] proffered me to be slave in all that she me
            would ordain while my life lasted.    --Testament of
                                                  Love.
      [1913 Webster]

   2. To endure use, or continue in existence, without
      impairment or exhaustion; as, this cloth lasts better than
      that; the fuel will last through the winter.
      [1913 Webster]

WordNet (r) 3.0 (2006):

lasting
    adj 1: continuing or enduring without marked change in status or
           condition or place; "permanent secretary to the
           president"; "permanent address"; "literature of permanent
           value" [syn: permanent, lasting] [ant: impermanent,
           temporary]
    2: existing for a long time; "hopes for a durable peace"; "a
       long-lasting friendship" [syn: durable, lasting, long-
       lasting, long-lived]
    3: retained; not shed; "persistent leaves remain attached past
       maturity"; "the persistent gills of fishes" [syn:
       persistent, lasting] [ant: caducous, shed]
    4: lasting a long time without change; "a lasting relationship"

Moby Thesaurus II by Grady Ward, 1.0:

221 Moby Thesaurus words for "lasting":
   abiding, adamantine, age-long, aged, alive, ancient, antique,
   assiduous, bulky, cartilaginous, changeless, chewy, chronic,
   chronological, cohesive, constant, continual, continuing,
   continuous, coriaceous, dense, diligent, diuturnal, dogged,
   drawn-out, durable, durational, durative, eidetic, endless,
   enduring, eternal, evergreen, everlasting, extended, faithful,
   fibrous, firm, fixed, fresh, frozen, green, gristly, hard, hardy,
   heavy, immobile, immutable, inalterable, incessant, incommutable,
   inconvertible, indefatigable, indefeasible, indelible,
   indissoluble, indomitable, industrious, inert, insistent,
   insusceptible of change, intact, interminable, intransient,
   intransmutable, invariable, inveterate, invincible, inviolate,
   irretrievable, irreversible, irrevocable, kept in remembrance,
   languishing, leatherlike, leathery, lengthened, lingering, long,
   long-continuing, long-drawn, long-drawn-out, long-lasting,
   long-lived, long-pending, long-standing, long-term, long-winded,
   longeval, longevous, loyal, macrobiotic, marathon, massive,
   never-tiring, noble, nonreturnable, nonreversible, obstinate,
   of long duration, of long standing, old, overlong, patient,
   patient as Job, perdurable, perduring, perennial, permanent,
   perpetual, perseverant, persevering, persistent, persisting,
   pertinacious, plodding, plugging, preoccupied, prolonged,
   protracted, quiescent, rapt, recalled, recollected, relentless,
   remaining, remembered, resistant, resolute, retained, reverseless,
   rigid, ropy, rugged, sedulous, sempervirent, sempiternal, sinewy,
   single-minded, sleepless, slogging, solid, sound, spun-out, stable,
   static, stationary, staying, steadfast, steady, stiff, stout,
   stretched-out, stringy, strong, stubborn, sturdy, sustained,
   temporal, tenacious, tireless, torpid, tough, tough as leather,
   unabating, unalterable, unalterative, unaltered, unceasing,
   unchangeable, unchanged, unchanging, unchecked, unconquerable,
   undaunted, undeflectable, undestroyed, undeviating, undiscouraged,
   undrooping, undying, unfading, unfailing, unfaltering, unflagging,
   unflinching, unforgotten, unintermitting, uninterrupted,
   unmodifiable, unnodding, unrelaxing, unrelenting, unremitting,
   unrestorable, unreturnable, unshifting, unsleeping, unsusceptible,
   unswerving, untiring, unvariable, unvaried, unvarying, unwavering,
   unwearied, unwearying, unwinking, unyielding, utterly attentive,
   vigorous, viscid, vital, vivid, weariless, well-built,
   well-constructed, well-founded, well-grounded, well-made, wiry