The Collaborative International Dictionary of English v.0.48:

Peg \Peg\ (p[e^]g), v. t. [imp. & p. p. Pegged; p. pr. & vb.
   n. Pegging.]
   1. To put pegs into; to fasten the parts of with pegs; as, to
      peg shoes; to confine with pegs; to restrict or limit
      closely.
      [1913 Webster]

            I will rend an oak
            And peg thee in his knotty entrails.  --Shak.
      [1913 Webster]

   2. (Cribbage) To score with a peg, as points in the game; as,
      she pegged twelwe points. [Colloq.]
      [1913 Webster]

   3. To identify; to recognize; as, she pegged him as a good
      carpenter; he was pegged as a blowhard as soon as he
      started speaking; he was pegged as a exceptional player
      even in high school.
      [PJC]

   4. (Baseball) To throw (a ball); as, he pegged the runner out
      at second.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Peg \Peg\ (p[e^]g), n. [OE. pegge; cf. Sw. pigg, Dan. pig a
   point, prickle, and E. peak.]
   1. A small, pointed piece of wood, used in fastening boards
      together, in attaching the soles of boots or shoes, etc.;
      as, a shoe peg.
      [1913 Webster]

   2. A wooden pin, or nail, on which to hang things, as coats,
      etc. Hence, colloquially and figuratively: A support; a
      reason; a pretext; as, a peg to hang a claim upon.
      [1913 Webster]

   3. One of the pins of a musical instrument, on which the
      strings are strained. --Shak.
      [1913 Webster]

   4. One of the pins used for marking points on a cribbage
      board.
      [1913 Webster]

   5. A step; a degree; esp. in the slang phrase "To take one
      down a peg."
      [1913 Webster]

            To screw papal authority to the highest peg.
                                                  --Barrow.
      [1913 Webster]

            And took your grandees down a peg.    --Hudibras.
      [1913 Webster]

   6. A drink of spirits, usually whisky or brandy diluted with
      soda water. [India]

            This over, the club will be visited for a "peg,"
            Anglice drink.                        --Harper's
                                                  Mag.
      [Webster 1913 Suppl.]

   7. (Baseball) a hard throw, especially one made to put out a
      baserunner; as, the peg to the plate went wild.
      [PJC]

   peg board, a board with multiple small holes into which
      pegs can be inserted in different arrays so as to form
      hooks from which to hang tools or other objects for
      convenient access; it is typically hung from a wall in a
      workshop.

   Peg ladder, a ladder with but one standard, into which
      cross pieces are inserted.

   Peg tankard, an ancient tankard marked with pegs, so as
      divide the liquor into equal portions. "Drink down to your
      peg." --Longfellow.

   Peg tooth. See Fleam tooth under Fleam.

   Peg top, a boy's top which is spun by throwing it.

   Screw peg, a small screw without a head, for fastening
      soles.
      [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Peg \Peg\, v. i.
   To work diligently, as one who pegs shoes; -- usually with
   on, at, or away; as, to peg away at a task.
   [1913 Webster]

WordNet (r) 3.0 (2006):

peg
    n 1: a wooden pin pushed or driven into a surface [syn: peg,
         nog]
    2: small markers inserted into a surface to mark scores or
       define locations etc. [syn: peg, pin]
    3: informal terms for the leg; "fever left him weak on his
       sticks" [syn: pin, peg, stick]
    4: a prosthesis that replaces a missing leg [syn: peg, wooden
       leg, leg, pegleg]
    5: regulator that can be turned to regulate the pitch of the
       strings of a stringed instrument
    6: a holder attached to the gunwale of a boat that holds the oar
       in place and acts as a fulcrum for rowing [syn: peg, pin,
       thole, tholepin, rowlock, oarlock]
    v 1: succeed in obtaining a position; "He nailed down a spot at
         Harvard" [syn: nail down, nail, peg]
    2: pierce with a wooden pin or knock or thrust a wooden pin into
    3: fasten or secure with a wooden pin; "peg a tent" [syn: peg,
       peg down]
    4: stabilize (the price of a commodity or an exchange rate) by
       legislation or market operations; "The weak currency was
       pegged to the US Dollar"

Moby Thesaurus II by Grady Ward, 1.0:

416 Moby Thesaurus words for "peg":
   amble, amount, anchor, articulate, baby tooth, barge, batten,
   batten down, beverage, bicuspid, bilge, bind, blain, bleb, blister,
   blob, bolt, boss, bow, bowl, bowl along, bridle, bubble, buckle,
   bucktooth, bulb, bulge, bulla, bump, bumper, bunch, bundle, bung,
   burl, butt, button, cahot, caliber, canine, carry on, cast,
   catapult, chain, change of pace, change-up, check valve, chine,
   chuck, chug on, chunk, clasp, cleat, clip, clump, cock, compass,
   condyle, convex, cork, crown, curve, cuspid, cut, cutter, dart,
   dash, deciduous tooth, degree, dent, denticle, denticulation,
   dentil, dentition, dig, distinguish, dogtooth, dovetail, dowel,
   downcurve, draft, drag, drain, dram, drench, drink, drop, drudge,
   ear, enchain, entrammel, extent, eyetooth, fag, fang, fastball,
   fasten, faucet, fetter, fire, flange, flap, fling, flip, flounce,
   foot, footslog, fore tooth, fork, forward pass, gagtooth, gall,
   gang tooth, gargle, gnarl, gold tooth, grade, grind, grinder, grub,
   gulp, guzzle, gyve, halt, hammer, hammer away, hamper, handcuff,
   handle, hasp, have, heave, height, hill, hinge, hippety-hop, hitch,
   hobble, hog-tie, hook, hop, hopple, hump, hunch, hurl, hurtle,
   identify, incisor, incurve, interval, jam, jerk, jigger, jog,
   jog on, joggle, joint, jolt, jump, keep at it, keep busy,
   keep doggedly at, keep driving, keep going, keep moving, keep on,
   knob, knot, know, know again, knuckleball, knur, knurl, lance, lap,
   lash, latch, lateral, lateral pass, launch, leap, leash, leg,
   let fly, level, libation, lid, limp, lip, lob, lock, loop, lumber,
   lump, lunge, lurch, make fast, make out, manacle, mark, measure,
   milk tooth, mince, miter, moil, molar, mole, moor, mortise,
   mountain, nail, nevus, nip, notch, nuance, nub, nubbin, nubble,
   outcurve, pace, paddle, pale, palisade, papilloma, pas, pass,
   peg away, peg down, pelt, period, permanent tooth, piaffe, piaffer,
   picket, pile, pin, pin down, pinion, pitch, pitchfork, pivot tooth,
   place, plane, plateau, plod, plod along, plug, plug along, plug at,
   plug away, point, portion, potation, potion, pound away, prance,
   premolar, proportion, pull, put, put in irons, put the shot, quaff,
   rabbet, rack, range, ratio, reach, realize, recall knowledge of,
   recognize, reidentify, remove, restrain, rib, ridge, ring, rivet,
   roll, rope, round, round of drinks, rub on, rung, sashay, saunter,
   scale, scarf, schlep, scope, screw, screwball, scrivello, scuff,
   scuffle, scuttle, sea cock, secure, serve, service, sew, shackle,
   shade, shadow, shamble, shank, shot, shot-put, shoulder, shuffle,
   shy, sidle, single-foot, sinker, sip, skewer, skip, slider, sling,
   slink, slither, slog, slog away, slouch, slurp, snag, snaggletooth,
   snap, snifter, snort, space, spigot, spike, spile, spill, spine,
   spitball, spitter, spot, stagger, stair, stake, stalk, stamp,
   standard, staple, step, stick, stint, stitch, stomp, stop, stopgap,
   stopper, stopple, straddle, straggle, straitjacket, strap, stride,
   stroll, strut, stud, stump, style, suck, sup, swagger, swig, swill,
   swing, tab, tack, tap, tell, tether, throw, tie, tie down, tie up,
   tilt, tittup, toddle, toggle, toil, tooth, toss, tot, totter,
   traipse, trammel, tramp, travail, tread, trip, trudge, tubercle,
   tubercule, tush, tusk, upcurve, valve, verruca, vesicle, waddle,
   wade through, wale, wamble, wart, wedge, welt, wet, wiggle,
   wisdom tooth, wobble, work away, zipper



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PEG
       PCI Express for Graphics (PCIe, Intel)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PEG
       Platform European Grid [conference] (grid)