The Collaborative International Dictionary of English v.0.48:

Hold \Hold\, v. i.
   In general, to keep one's self in a given position or
   condition; to remain fixed. Hence:
   [1913 Webster]

   1. Not to move; to halt; to stop; -- mostly in the
      imperative.
      [1913 Webster]

            And damned be him that first cries, "Hold, enough!"
                                                  --Shak.
      [1913 Webster]

   2. Not to give way; not to part or become separated; to
      remain unbroken or unsubdued.
      [1913 Webster]

            Our force by land hath nobly held.    --Shak.
      [1913 Webster]

   3. Not to fail or be found wanting; to continue; to last; to
      endure a test or trial; to abide; to persist.
      [1913 Webster]

            While our obedience holds.            --Milton.
      [1913 Webster]

            The rule holds in land as all other commodities.
                                                  --Locke.
      [1913 Webster]

   4. Not to fall away, desert, or prove recreant; to remain
      attached; to cleave; -- often with with, to, or for.
      [1913 Webster]

            He will hold to the one and despise the other.
                                                  --Matt. vi. 24
      [1913 Webster]

   5. To restrain one's self; to refrain.
      [1913 Webster]

            His dauntless heart would fain have held
            From weeping, but his eyes rebelled.  --Dryden.
      [1913 Webster]

   6. To derive right or title; -- generally with of.
      [1913 Webster]

            My crown is absolute, and holds of none. --Dryden.
      [1913 Webster]

            His imagination holds immediately from nature.
                                                  --Hazlitt.
      [1913 Webster]

   Hold on! Hold up! wait; stop; forbear. [Collog] -- To
   hold forth, to speak in public; to harangue; to preach.
      --L'Estrange.

   To hold in, to restrain one's self; as, he wanted to laugh
      and could hardly hold in.

   To hold off, to keep at a distance.

   To hold on, to keep fast hold; to continue; to go on. "The
      trade held on for many years," --Swift.

   To hold out, to last; to endure; to continue; to maintain
      one's self; not to yield or give way.

   To hold over, to remain in office, possession, etc., beyond
      a certain date.

   To hold to or To hold with, to take sides with, as a
      person or opinion.

   To hold together, to be joined; not to separate; to remain
      in union. --Dryden. --Locke.

   To hold up.
      (a) To support one's self; to remain unbent or unbroken;
          as, to hold up under misfortunes.
      (b) To cease raining; to cease to stop; as, it holds up.
          --Hudibras.
      (c) To keep up; not to fall behind; not to lose ground.
          --Collier.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hold up \Hold up\ (h[=o]ld [u^]p"), v. t.
   1. To rob, usually at gunpoint or knifepoint.
      [PJC]

   2. To delay; as, bad weather held up the satellite launch for
      two days.
      [PJC]

WordNet (r) 3.0 (2006):

hold up
    v 1: be the physical support of; carry the weight of; "The beam
         holds up the roof"; "He supported me with one hand while I
         balanced on the beam"; "What's holding that mirror?" [syn:
         hold, support, sustain, hold up]
    2: hold up something as an example; hold up one's achievements
       for admiration
    3: cause to be slowed down or delayed; "Traffic was delayed by
       the bad weather"; "she delayed the work that she didn't want
       to perform" [syn: delay, detain, hold up] [ant:
       hurry, rush]
    4: rob at gunpoint or by means of some other threat [syn: hold
       up, stick up]
    5: continue to live through hardship or adversity; "We went
       without water and food for 3 days"; "These superstitions
       survive in the backwaters of America"; "The race car driver
       lived through several very serious accidents"; "how long can
       a person last without food and water?" [syn: survive,
       last, live, live on, go, endure, hold up, hold
       out]
    6: resist or confront with resistance; "The politician defied
       public opinion"; "The new material withstands even the
       greatest wear and tear"; "The bridge held" [syn: defy,
       withstand, hold, hold up]
    7: resist or withstand wear, criticism, etc.; "Her shoes won't
       hold up"; "This theory won't hold water" [syn: stand up,
       hold up, hold water]

Moby Thesaurus II by Grady Ward, 1.0:

328 Moby Thesaurus words for "hold up":
   adjourn, advertise, afford support, air, arrest, back, back up,
   backpedal, backwater, be consistent, be proof against, be the case,
   be true, be truthful, be unflappable, bear, bear out, bear up,
   bear up against, blazon forth, bleed, bleed white, block, bolster,
   bolster up, boost, bottle up, brace, brake, brandish, bridle, buoy,
   buoy up, buttress, carry, cast up, check, clip, clip the wings,
   come up fighting, commit robbery, confine, conform to fact,
   constrain, contain, continue, control, cool, cool off,
   countercheck, cradle, crutch, curb, curtail, cushion, dam up, damp,
   dampen, dangle, decelerate, defer, defy, delay, demonstrate,
   detain, display, dompt, drag, drag out, draw rein, ease off,
   ease up, elevate, emblazon, endure, enjoin, erect, escalate,
   exhibit, exploit, extend, finance, flash, flaunt, fleece, float,
   float high, flourish, fund, get by, get home free, give support,
   gouge, govern, guard, hack it, hang fire, hang in, hang in there,
   hang on, hang tough, hang up, heave, heft, heighten, heist, hijack,
   hike, hinder, hoick, hoist, hold, hold at bay, hold back,
   hold fast, hold good, hold in, hold in check, hold in leash,
   hold off, hold on, hold out, hold over, hold together, hold true,
   hold water, impede, inhibit, intercept, interfere, intermeddle,
   interrupt, intervene, jerk up, keep, keep afloat, keep back,
   keep from, keep in, keep in check, keep under control, keep up,
   knock over, knock up, lag, lay aside, lay by, lay over,
   lay under restraint, lend support, let down, let up, levitate,
   lift, lift up, live through it, live with it, lob, loft,
   lose ground, lose momentum, lose speed, mainstay, maintain,
   make late, manifest, meddle, meet requirements, moderate, mug,
   never say die, not budge, not flag, not give up, not weaken,
   obstruct, oppose, overcharge, overprice, overtax, parade, pass,
   pass muster, perk up, pigeonhole, pillow, postpone, profiteer,
   prohibit, prolong, prop, prop up, prorogate, prorogue, protract,
   prove out, prove to be, prove true, pull, pull in, push aside,
   put aside, put forth, put forward, put off, put on ice, raise,
   raise up, rear, rear up, rebuff, recess, reef, rein, rein in,
   reinforce, relax, remain firm, remain valid, remit, repel, repress,
   repulse, reserve, resist, restrain, retard, retrench, ride high,
   ride it out, rip off, rise, rob, scotch, screw, see it out,
   set aside, set back, set by, set up, shelve, shift off, shore,
   shore up, shoulder, skin, sky, slack off, slack up, slacken,
   sleep on, slow, slow down, slow up, snub, soak, sport, stand,
   stand fast, stand firm, stand over, stand pat, stand the test,
   stand up, stave off, stay, stay it out, stay put,
   stay the distance, stay with it, stick, stick it, stick it out,
   stick out, stick to it, stick together, stick up, stick with it,
   sting, stop, straiten, stretch out, subsidize, subvention,
   subventionize, support, suppress, surcharge, suspend, sustain,
   sweat it out, swindle, table, take a recess, take in sail, take it,
   throttle down, throw up, tough it out, trumpet, trumpet forth,
   underbrace, undergird, underlie, underpin, underset, up, upbear,
   upbuoy, upcast, upheave, uphoist, uphold, upkeep, uplift, upraise,
   uprear, upthrow, vaunt, victimize, waft, waive, wash, wave,
   weather, weather the storm, withhold, withstand