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4 definitions found
 for listless
From The Collaborative International Dictionary of English v.0.48 :

  Listless \List"less\, a. [OE. listles, lustles. See Lust.]
     Having no desire or inclination; indifferent; heedless;
     spiritless. " A listless unconcern." --Thomson.
     [1913 Webster]
           Benumbed with cold, and listless of their gain.
     [1913 Webster]
           I was listless, and desponding.          --Swift.
     Syn: Heedless; careless; indifferent; vacant; uninterested;
          languid; spiritless; supine; indolent. --
          List"less*ly, adv. -- List"less*ness, n.
          [1913 Webster]

From WordNet (r) 3.0 (2006) :

      adj 1: lacking zest or vivacity; "he was listless and bored"
      2: marked by low spirits; showing no enthusiasm; "a dispirited
         and divided Party"; "reacted to the crisis with listless
         resignation" [syn: dispirited, listless]

From Moby Thesaurus II by Grady Ward, 1.0 :

  143 Moby Thesaurus words for "listless":
     Laodicean, Olympian, aloof, anemic, apathetic, asthenic, ataractic,
     benumbed, blah, blase, bloodless, bored, careless, casual, chicken,
     comatose, cool, cowardly, dead, debilitated, desensitized,
     detached, devil-may-care, disinterested, dispassionate,
     disregardful, distant, dopey, dormant, drooping, droopy, drugged,
     dull, easygoing, effete, enervated, etiolated, exanimate, faint,
     faintish, feeble, flabby, flaccid, floppy, gone, gutless,
     heartless, heavy, hebetudinous, heedless, hopeless, imbecile,
     impassive, impotent, in a stupor, inanimate, inattentive,
     incurious, indifferent, inert, inexcitable, insouciant, jaded,
     lackadaisical, languid, languishing, languorous, leaden, lethargic,
     lifeless, limber, limp, lukewarm, lumpish, lustless, marrowless,
     mindless, moribund, negligent, nerveless, nonchalant, numb, numbed,
     passive, perfunctory, phlegmatic, pithless, pluckless, pococurante,
     pooped, powerless, reckless, regardless, resigned, rubbery,
     sapless, sated, sinewless, slack, sleepy, slow, sluggish, soft,
     somnolent, soporific, spent, spineless, spiritless, spunkless,
     stagnant, stagnating, stoic, stolid, strengthless, stultified,
     stupefied, supine, tepid, thoughtless, torpid, turned-off,
     unanxious, uncaring, unconcerned, undiscriminating, unemotional,
     unenthusiastic, unhardened, uninquiring, uninterested, uninvolved,
     unmindful, unnerved, unsolicitous, unstrung, vegetable, vegetative,
     wan, weak, weakly, weary, withdrawn, world-weary

From The Free On-line Dictionary of Computing (30 December 2018) :

      In functional programming, a property of a
     function which allows it to be combined with other functions
     in a way that eliminates intermediate data structures,
     especially lists.
     Phil Wadler's thesis gives the conditions for a function to
     be in listless form: each input list is traversed only once,
     one element at a time, from left to right.  Each output list
     is generated once, one element at a time, from left to right.
     No other lists are generated or traversed.
     Not all functions can be expressed in listless form
     (e.g. reverse).

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