The Collaborative International Dictionary of English v.0.48:

Join \Join\ (join), v. t. [imp. & p. p. Joined (joind); p. pr.
   & vb. n. Joining.] [OE. joinen, joignen, F. joindre, fr. L.
   jungere to yoke, bind together, join; akin to jugum yoke. See
   Yoke, and cf. Conjugal, Junction, Junta.]
   [1913 Webster]
   1. To bring together, literally or figuratively; to place in
      contact; to connect; to couple; to unite; to combine; to
      associate; to add; to append.
      [1913 Webster]

            Woe unto them that join house to house. --Is. v. 8.
      [1913 Webster]

            Held up his left hand, which did flame and burn
            Like twenty torches joined.           --Shak.
      [1913 Webster]

            Thy tuneful voice with numbers join.  --Dryden.
      [1913 Webster]

   2. To associate one's self to; to be or become connected
      with; to league one's self with; to unite with; as, to
      join a party; to join the church.
      [1913 Webster]

            We jointly now to join no other head. --Dryden.
      [1913 Webster]

   3. To unite in marriage.
      [1913 Webster]

            He that joineth his virgin in matrimony. --Wyclif.
      [1913 Webster]

            What, therefore, God hath joined together, let not
            man put asunder.                      --Matt. xix.
                                                  6.
      [1913 Webster]

   4. To enjoin upon; to command. [Obs. & R.]
      [1913 Webster]

            They join them penance, as they call it. --Tyndale.
      [1913 Webster]

   5. To accept, or engage in, as a contest; as, to join
      encounter, battle, issue. --Milton.
      [1913 Webster]

   6. To meet with and accompany; as, we joined them at the
      restaurant.
      [PJC]

   7. To combine with (another person) in performing some
      activity; as, join me in welcoming our new president.
      [PJC]

   To join battle, To join issue. See under Battle,
      Issue.

   Syn: To add; annex; unite; connect; combine; consociate;
        couple; link; append. See Add.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

joined \joined\ adj.
   1. married. unmarried

   Syn: united.
        [WordNet 1.5]

   2. connected by a link, as railway cars or trailer trucks.

   Syn: coupled, linked.
        [WordNet 1.5]

   3. connected by or sharing a wall with another building.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

joined
    adj 1: of or relating to two people who are married to each
           other [syn: joined, united]
    2: connected by a link, as railway cars or trailer trucks [syn:
       coupled, joined, linked]

Moby Thesaurus II by Grady Ward, 1.0:

177 Moby Thesaurus words for "joined":
   accessory, accompanying, accumulated, adjacent, adjoining,
   affiliate, affiliated, agglomerate, aggregate, allied, amalgamated,
   amassed, articulated, assembled, assimilated, associate,
   associated, attendant, attending, banded together, blended,
   bordering, bound, bracketed, bunched, bundled, catenated,
   ceaseless, clumped, clustered, coincident, collateral, collected,
   combinative, combinatory, combined, compact, comprehensive,
   concatenated, concomitant, concurrent, conglomerate, congregate,
   congregated, conjoined, conjoint, conjugate, conjunct, conjunctive,
   connected, connecting, connective, consecutive, consistent,
   consolidated, constant, conterminous, contiguous, continual,
   continued, continuing, continuous, copulate, corporate, correlated,
   correlative, coterminous, coupled, cumulate, cyclical, direct,
   eclectic, end to end, endless, endways, endwise, face to face,
   fascicled, fasciculated, featureless, fellow, fused, gapless,
   gathered, glomerate, hand-in-glove, hand-in-hand, heaped,
   immediate, implicated, in session, incessant, inclusive,
   incorporated, integrated, interlinked, interlocked, interminable,
   interrelated, intimate, involved, joint, jointless, juxtaposed,
   juxtapositional, juxtapositive, knotted, leagued, linked, lumped,
   massed, matched, mated, meeting, merged, mixed, monotonous, mutual,
   neighbor, neighboring, never-ending, next, nonstop, of that ilk,
   of that kind, one, orderly, packaged, paired, parallel, perennial,
   periodic, piled, recurrent, related, repetitive, round-the-clock,
   running, seamless, sequent, sequential, serial, serried,
   simultaneous, smooth, spliced, stable, stacked, steady, straight,
   syncretistic, syncretized, synthesized, tied, tight,
   twenty-four-hour, twin, twinned, unbroken, unceasing,
   undifferentiated, undivided, unending, uniform, unintermitted,
   unintermittent, unintermitting, uninterrupted, united, unrelieved,
   unremitting, unseparated, unstopped, wed, wedded, wrapped up,
   yoked