The Collaborative International Dictionary of English v.0.48:

Merge \Merge\, v. i.
   To be sunk, swallowed up, or lost.
   [1913 Webster]

         Native irresolution had merged in stronger motives.
                                                  --I. Taylor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

merge \merge\ (m[~e]rj), v. t. [imp. & p. p. Merged
   (m[~e]rjd); p. pr. & vb. n. Merging (m[~e]r"j[i^]ng).] [L.
   mergere, mersum. Cf. Emerge, Immerse, Marrow.]
   To cause to be swallowed up; to immerse; to sink; to absorb.
   [1913 Webster]

         To merge all natural . . . sentiment in inordinate
         vanity.                                  --Burke.
   [1913 Webster]

         Whig and Tory were merged and swallowed up in the
         transcendent duties of patriots.         --De Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

merge
    v 1: become one; "Germany unified officially in 1990"; "the
         cells merge" [syn: unify, unite, merge] [ant: break
         apart, disunify]
    2: mix together different elements; "The colors blend well"
       [syn: blend, flux, mix, conflate, commingle,
       immix, fuse, coalesce, meld, combine, merge]
    3: join or combine; "We merged our resources" [syn: unite,
       unify, merge]

Moby Thesaurus II by Grady Ward, 1.0:

242 Moby Thesaurus words for "merge":
   accouple, accumulate, act in concert, act together, add, adhere,
   admix, affiliate, agglutinate, alloy, ally, alter into, amalgamate,
   amass, articulate, assemble, assimilate, associate, band,
   band together, baptize, be converted into, be in league, become,
   bemingle, blend, bond, bracket, bridge, bridge over, build,
   build up, bunch, bunch up, bury, cement, chain, change into,
   clap together, clinch, clot, club together, cluster, coact,
   coalesce, cohere, collaborate, collect, collude, combine,
   come round to, come together, commingle, commix, communicate,
   compose, compound, comprise, concatenate, concert, concoct,
   concord, concur, confederate, conglobulate, conglomerate,
   congregate, conjoin, conjugate, connect, consist of, consolidate,
   conspire, constitute, construct, converge, cooperate, copulate,
   couple, cover, crowd, date, deluge, dip, do business with, douse,
   drown, duck, dunk, embody, embrace, emulsify, encompass, engulf,
   enter into, evolve into, fabricate, fall into, federate,
   flock together, flow together, flux, forgather, form, fuse,
   gang around, gang up, gather, gather around, get heads together,
   get together, glue, go into, go partners, grow together,
   hang together, harmonize, hash, herd together, hive, hold together,
   homogenize, hook up, horde, huddle, identify, immerge, immerse,
   immingle, immix, include, incorporate, integrate, interblend,
   intercommunicate, interfuse, interlace, interlard, intermingle,
   intermix, intertwine, interweave, inundate, join, join in,
   join together, jumble, keep together, knead, knit, knot,
   lapse into, lay together, league, league together, link,
   lump together, make, make common cause, make one, make up, marry,
   marshal, mass, meet, meld, melt into, melt into one, merge in,
   mill, mingle, mingle-mangle, mix, mix up, mobilize, muster,
   open into, organize, overwhelm, pair, partner, pass into,
   piece together, play ball, plunge in water, pool, pull together,
   put heads together, put together, rally, rally around, reciprocate,
   reembody, rendezvous, ripen into, roll into one, run into,
   scramble, seethe, settle into, shade into, shift into, shuffle,
   sink, solder, solidify, souse, span, splice, stand together,
   stick together, stir up, stream, structure, submerge, submerse,
   surge, swarm, syncretize, syndicate, synthesize, take in, tape,
   team up, throng, throw in together, throw together, tie, tie in,
   tie up, toss together, turn into, turn to, unify, unite,
   unite efforts, unite in, weld, whelm, work, work together, yoke