The Collaborative International Dictionary of English v.0.48:

Tell \Tell\, v. i.
   1. To give an account; to make report.
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            That I may publish with the voice of thankgiving,
            and tell of all thy wondrous works.   --Ps. xxvi. 7.
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   2. To take effect; to produce a marked effect; as, every shot
      tells; every expression tells.
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   To tell of.
      (a) To speak of; to mention; to narrate or describe.
      (b) To inform against; to disclose some fault of.

   To tell on, to inform against. [Archaic & Colloq.]
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            Lest they should tell on us, saying, So did David.
                                                  --1 Sam.
                                                  xxvii. 11.
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The Collaborative International Dictionary of English v.0.48:

Tell \Tell\ (t[e^]l), v. t. [imp. & p. p. Told (t[=o]ld); p.
   pr. & vb. n. Telling.] [AS. tellan, from talu tale, number,
   speech; akin to D. tellen to count, G. z[aum]hlen, OHG.
   zellen to count, tell, say, Icel. telja, Dan. tale to speak,
   t[ae]lle to count. See Tale that which is told.]
   1. To mention one by one, or piece by piece; to recount; to
      enumerate; to reckon; to number; to count; as, to tell
      money. "An heap of coin he told." --Spenser.
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            He telleth the number of the stars.   --Ps. cxlvii.
                                                  4.
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            Tell the joints of the body.          --Jer. Taylor.
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   2. To utter or recite in detail; to give an account of; to
      narrate.
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            Of which I shall tell all the array.  --Chaucer.
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            And not a man appears to tell their fate. --Pope.
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   3. To make known; to publish; to disclose; to divulge.
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            Why didst thou not tell me that she was thy wife?
                                                  --Gen. xii.
                                                  18.
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   4. To give instruction to; to make report to; to acquaint; to
      teach; to inform.
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            A secret pilgrimage,
            That you to-day promised to tell me of? --Shak.
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   5. To order; to request; to command.
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            He told her not to be frightened.     --Dickens.
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   6. To discern so as to report; to ascertain by observing; to
      find out; to discover; as, I can not tell where one color
      ends and the other begins.
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   7. To make account of; to regard; to reckon; to value; to
      estimate. [Obs.]
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            I ne told no dainity of her love.     --Chaucer.
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   Note: Tell, though equivalent in some respect to speak and
         say, has not always the same application. We say, to
         tell truth or falsehood, to tell a number, to tell the
         reasons, to tell something or nothing; but we never
         say, to tell a speech, discourse, or oration, or to
         tell an argument or a lesson. It is much used in
         commands; as, tell me the whole story; tell me all you
         know.
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   To tell off, to count; to divide. --Sir W. Scott.
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   Syn: To communicate; impart; reveal; disclose; inform;
        acquaint; report; repeat; rehearse; recite.
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The Collaborative International Dictionary of English v.0.48:

Tell \Tell\, n.
   That which is told; tale; account. [R.]
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         I am at the end of my tell.              --Walpole.
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The Collaborative International Dictionary of English v.0.48:

Tell \Tell\, n. [Ar.]
   A hill or mound. --W. M. Thomson.
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WordNet (r) 3.0 (2006):

Tell
    n 1: a Swiss patriot who lived in the early 14th century and who
         was renowned for his skill as an archer; according to
         legend an Austrian governor compelled him to shoot an apple
         from his son's head with his crossbow (which he did
         successfully without mishap) [syn: Tell, William Tell]
    v 1: express in words; "He said that he wanted to marry her";
         "tell me what is bothering you"; "state your opinion";
         "state your name" [syn: state, say, tell]
    2: let something be known; "Tell them that you will be late"
    3: narrate or give a detailed account of; "Tell what happened";
       "The father told a story to his child" [syn: tell,
       narrate, recount, recite]
    4: give instructions to or direct somebody to do something with
       authority; "I said to him to go home"; "She ordered him to do
       the shopping"; "The mother told the child to get dressed"
       [syn: order, tell, enjoin, say]
    5: discern or comprehend; "He could tell that she was unhappy"
    6: inform positively and with certainty and confidence; "I tell
       you that man is a crook!" [syn: assure, tell]
    7: give evidence; "he was telling on all his former colleague"
       [syn: tell, evidence]
    8: mark as different; "We distinguish several kinds of maple"
       [syn: distinguish, separate, differentiate, secern,
       secernate, severalize, severalise, tell, tell
       apart]