The Collaborative International Dictionary of English v.0.48:

Communicate \Com*mu"ni*cate\ (k[o^]m*m[=u]"n[i^]*k[=a]t ), v. t.
   [imp. & p. p. Communicated; p. pr. & vb. n.
   Communicating.] [L. communicatus, p. p. of communicare to
   communicate, fr. communis common. See Commune, v. i.]
   1. To share in common; to participate in. [Obs.]
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            To thousands that communicate our loss. --B. Jonson
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   2. To impart; to bestow; to convey; as, to communicate a
      disease or a sensation; to communicate motion by means of
      a crank.
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            Where God is worshiped, there he communicates his
            blessings and holy influences.        --Jer. Taylor.
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   3. To make known; to recount; to give; to impart; as, to
      communicate information to any one.
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   4. To administer the communion to. [R.]
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            She [the church] . . . may communicate him. --Jer.
                                                  Taylor.
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   Note: This verb was formerly followed by with before the
         person receiving, but now usually takes to after it.
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               He communicated those thoughts only with the Lord
               Digby.                             --Clarendon.

   Syn: To impart; bestow; confer; reveal; disclose; tell;
        announce; recount; make known.

   Usage: To Communicate, Impart, Reveal. Communicate is
          the more general term, and denotes the allowing of
          others to partake or enjoy in common with ourselves.
          Impart is more specific. It is giving to others a part
          of what we had held as our own, or making them our
          partners; as, to impart our feelings; to impart of our
          property, etc. Hence there is something more intimate
          in imparting intelligence than in communicating it. To
          reveal is to disclose something hidden or concealed;
          as, to reveal a secret.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Communicate \Com*mu"ni*cate\, v. i.
   1. To share or participate; to possess or enjoy in common; to
      have sympathy.
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            Ye did communicate with my affliction. --Philip. iv.
                                                  4.
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   2. To give alms, sympathy, or aid.
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            To do good and to communicate forget not. --Heb.
                                                  xiii. 16.
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   3. To have intercourse or to be the means of intercourse; as,
      to communicate with another on business; to be connected;
      as, a communicating artery.
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            Subjects suffered to communicate and to have
            intercourse of traffic.               --Hakluyt.
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            The whole body is nothing but a system of such
            canals, which all communicate with one another.
                                                  --Arbuthnot.
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   4. To partake of the Lord's supper; to commune.
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            The primitive Christians communicated every day.
                                                  --Jer. Taylor.
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WordNet (r) 3.0 (2006):

communicate
    v 1: transmit information ; "Please communicate this message to
         all employees"; "pass along the good news" [syn:
         communicate, pass on, pass, pass along, put
         across]
    2: transmit thoughts or feelings; "He communicated his anxieties
       to the psychiatrist" [syn: communicate, intercommunicate]
    3: transfer to another; "communicate a disease" [syn: convey,
       transmit, communicate]
    4: join or connect; "The rooms communicated"
    5: be in verbal contact; interchange information or ideas; "He
       and his sons haven't communicated for years"; "Do you
       communicate well with your advisor?"
    6: administer Communion; in church [ant: curse,
       excommunicate, unchurch]
    7: receive Communion, in the Catholic church [syn: commune,
       communicate]

Moby Thesaurus II by Grady Ward, 1.0:

249 Moby Thesaurus words for "communicate":
   abut, accord, acquaint, adhere, administer, administer Communion,
   advertise, advertise of, advice, advise, afford, allot, allow,
   announce, apprise, articulate, assign, associate with,
   attend Communion, attend Mass, award, bandy words,
   be in connection, be in contact, be in tune, bestow, bestow on,
   betray, border, break, breathe, brief, bring word, broadcast, butt,
   carry over, celebrate, celebrate Mass, chew the fat, chew the rag,
   chime, chin, chorus, clinch, cohere, colloque, colloquize,
   come out with, come together, commerce, commerce with,
   commune with, communicate with, communication, communion, confab,
   confabulate, confer, connect, consign, converge, conversation,
   converse, converse with, conversing, convey, correspond with, deal,
   deal out, deal with, deliver, deport, diffuse, directive, disclose,
   discourse with, discover, discussion, dish out, dispense,
   disseminate, divulge, dole, dole out, donate, embrace, emit,
   enlighten, enunciate, exchange, expel, export, express, extend,
   extradite, familiarize, fling off, fork out, formulate, get across,
   get over, get through to, gift, gift with, give, give expression,
   give freely, give notice, give out, give out with, give the facts,
   give tongue, give utterance, give voice, give word, grant,
   grow together, hand down, hand forward, hand on, hand out,
   hand over, hang together, have dealings with, have intercourse,
   have truck with, heap, help to, hint, hold communication,
   hold together, impart, imply, import, inform, instruct,
   intelligence, interchange, intercommunicate, intercommunication,
   intercourse, issue, join, keep, knit, lavish, leave word, let have,
   let know, let on, let out, line, lip, make known, make over, march,
   meet, mention to, merge, metastasize, metathesize, mete, mete out,
   news, notify, observe, offer, out with, pass, pass along, pass on,
   pass over, pass the buck, perfuse, phonate, phrase, pour,
   pour forth, present, proffer, promulgate, pronounce, publicize,
   put across, put forth, put in words, rain, raise, reach,
   receive the Sacrament, relate, relay, render, report, reveal, say,
   send, send word, serve, serve notice, set forth, share, share with,
   shell out, shoot the breeze, shower, signal, slip, snow, solemnize,
   sound, speak, speak with, spread, suggest, supply, switch,
   take counsel with, talk, talk together, talking, tell, tender,
   throw off, tidings, traffic with, transfer, transfer property,
   transfuse, translate, translocate, transmit, transplace,
   transplant, transpose, turn over, unite, utter, verbalize, verge,
   verse, visit with, vocalize, voice, vouchsafe, wavelength, whisper,
   word, yield