The Collaborative International Dictionary of English v.0.48:

Stray \Stray\, v. i. [imp. & p. p. Strayed; p. pr. & vb. n.
   Straying.] [OF. estraier, estraer, to stray, or as adj.,
   stray, fr. (assumed) L. stratarius roving the streets, fr. L.
   strata (sc. via) a paved road. See Street, and Stray, a.]
   1. To wander, as from a direct course; to deviate, or go out
      of the way.
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            Thames among the wanton valleys strays. --Denham.
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   2. To wander from company, or from the proper limits; to rove
      at large; to roam; to go astray.
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            Now, until the break of day,
            Through this house each fairy stray.  --Shak.
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            A sheep doth very often stray.        --Shak.
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   3. Figuratively, to wander from the path of duty or
      rectitude; to err.
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            We have erred and strayed from thy ways. --??? of
                                                  Com. Prayer.
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            While meaner things, whom instinct leads,
            Are rarely known to stray.            --Cowper.
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   Syn: To deviate; err; swerve; rove; roam; wander.
        [1913 Webster]

WordNet (r) 3.0 (2006):

straying
    adj 1: unable to find your way; "found the straying sheep"

Moby Thesaurus II by Grady Ward, 1.0:

164 Moby Thesaurus words for "straying":
   Wanderjahr, aberrancy, aberrant, aberration, abnormal, abroad,
   adrift, afoot and lighthearted, all abroad, all off, all wrong,
   amiss, amorphous, anomalistic, anomalous, askew, astray, at fault,
   awry, bend, beside the mark, bias, branching off, bumming,
   circuitousness, circumforaneous, corner, corrupt, crook, curve,
   deceptive, declination, defective, delusive, departure, detour,
   deviance, deviancy, deviant, deviation, deviational, deviative,
   deviousness, different, digression, discursion, discursive,
   distorted, divagation, divagatory, divarication, divergence,
   divergent, diversion, dogleg, double, drift, drifting, eccentric,
   errant, errantry, erratic, erring, erroneous, excursion, excursus,
   exorbitation, fallacious, false, faultful, faulty, flawed,
   flitting, floating, footloose, footloose and fancy-free, formless,
   fugitive, gadding, gypsy-like, gypsyish, hairpin, heretical,
   heteroclite, heterodox, heteromorphic, hoboism, illogical,
   illusory, indirection, irregular, itineracy, itinerancy,
   landloping, meandering, migrational, migratory, nomad, nomadic,
   nomadism, not right, not true, obliquity, off, off the track, out,
   peccant, peregrination, pererration, perverse, perverted, ramble,
   rambling, ranging, roam, roaming, rove, roving, self-contradictory,
   shapeless, sheer, shift, shifting, shifting course, shifting path,
   skew, slant, straggling, stray, strolling, subnormal, sweep,
   swerve, swerving, swinging, tack, traipsing, transient, transitory,
   transmigratory, turn, turning, twist, unfactual, unnatural,
   unorthodox, unproved, untrue, vagabond, vagabondage, vagabondia,
   vagabondism, vagrancy, vagrant, variation, veer, wandering,
   wanderlust, warp, wayfaring, wide, wrong, yaw, zigzag