The Collaborative International Dictionary of English v.0.48:

Laggard \Lag"gard\, a. [Lag + -ard.]
   Slow; sluggish; backward.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Laggard \Lag"gard\, n.
   One who lags; a loiterer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

laggard
    adj 1: wasting time [syn: dilatory, laggard, poky,
           pokey]
    n 1: someone who takes more time than necessary; someone who
         lags behind [syn: dawdler, drone, laggard, lagger,
         trailer, poke]

Moby Thesaurus II by Grady Ward, 1.0:

109 Moby Thesaurus words for "laggard":
   Micawberish, apathetic, backward, balking, balky, bone-lazy,
   cadging, clock watcher, comatose, dallier, dallying, dawdle,
   dawdler, delaying, deliberate, diddler, dilatory, dillydallier,
   dillydallying, do-nothing, doless, dolittle, doodler, drone,
   dronish, drony, easy, easygoing, ergophobic, faineant,
   foot-dragger, foot-dragging, gentleman of leisure, goldbrick,
   goldbricker, good-for-nothing, goof-off, grudging, idler,
   impassive, indifferent, indolent, lackadaisical, lagging, lax,
   lazy, lazybones, leisurely, lethargic, lie-abed, lingerer,
   lingering, loafer, loath, loiterer, loitering, loller, lotus-eater,
   lounger, lubber, mope, moper, nonaggressive, parasitic,
   perfunctory, phlegmatic, plodder, potterer, procrastinating,
   procrastinative, procrastinator, procrastinatory, putterer,
   reluctant, remiss, renitent, restive, scrounging, shiftless,
   shuffling, slack, sleepyhead, slothful, slouch, sloucher, slow,
   slow goer, slow to, slow-foot, slowbelly, slowpoke, slug, sluggard,
   sluggish, snail, sponging, stick-in-the-mud, straggler,
   time killer, time waster, tortoise, trifler, unenterprising,
   unenthusiastic, unhasty, unhurried, unzealous,
   waiter on Providence, work-shy