The Collaborative International Dictionary of English v.0.48:

Ever \Ev"er\adv. [OE. ever, [ae]fre, AS. [ae]fre; perh. akin to
   AS. [=a] always. Cf. Aye, Age,Evry, Never.]
   [Sometimes contracted into e'er.]
   1. At any time; at any period or point of time.
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            No man ever yet hated his own flesh.  --Eph. v. 29.
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   2. At all times; through all time; always; forever.
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            He shall ever love, and always be
            The subject of by scorn and cruelty.  --Dryder.
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   3. Without cessation; continually.
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   Note: Ever is sometimes used as an intensive or a word of
         enforcement. "His the old man e'er a son?" --Shak.
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               To produce as much as ever they can. --M. Arnold.
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   Ever and anon, now and then; often. See under Anon.

   Ever is one, continually; constantly. [Obs.] --Chaucer.

   Ever so, in whatever degree; to whatever extent; -- used to
      intensify indefinitely the meaning of the associated
      adjective or adverb. See Never so, under Never. "Let
      him be ever so rich." --Emerson.
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            And all the question (wrangle e'er so long),
            Is only this, if God has placed him wrong. --Pope.
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            You spend ever so much money in entertaining your
            equals and betters.                   --Thackeray.

   For ever, eternally. See Forever.

   For ever and a day, emphatically forever. --Shak.
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            She [Fortune] soon wheeled away, with scornful
            laughter, out of sight for ever and day. --Prof.
                                                  Wilson.

   Or ever (for or ere), before. See Or, ere. [Archaic]
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            Would I had met my dearest foe in heaven
            Or ever I had seen that day, Horatio! --Shak.
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   Note: Ever is sometimes joined to its adjective by a hyphen,
         but in most cases the hyphen is needless; as, ever
         memorable, ever watchful, ever burning.
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WordNet (r) 3.0 (2006):

ever
    adv 1: at any time; "did you ever smoke?"; "the best con man of
           all time" [syn: ever, of all time]
    2: at all times; all the time and on every occasion; "I will
       always be there to help you"; "always arrives on time";
       "there is always some pollution in the air"; "ever hoping to
       strike it rich"; "ever busy" [syn: always, ever, e'er]
       [ant: ne'er, never]
    3: (intensifier for adjectives) very; "she was ever so friendly"
       [syn: ever, ever so]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "ever":
   all the time, always, annoyingly, anytime, anyway, anywise, at all,
   at all times, at any cost, at any time, aye, by any chance,
   by any means, by merest chance, ceaselessly, confoundedly,
   consistently, constantly, consummately, continually, continuously,
   daily, daily and hourly, day after day, day and night, endlessly,
   eternally, even, ever and again, ever and anon, everlastingly,
   evermore, every day, every hour, every moment, excessively,
   extremely, for all time, for aye, for good, for keeps, forever,
   forever and aye, forevermore, grievously, hour after hour, hourly,
   if at all, immensely, in all ages, in any case, in any way,
   incessantly, inordinately, invariably, month after month, mortally,
   night and day, now and forever, on and on, once, over, overfull,
   overly, overmuch, perennially, perpetually, plaguey, rapidly,
   regularly, right along, steadily, still, super, sustainedly,
   throughout the ages, till doomsday, till time stops, too,
   unceasingly, unduly, unintermittently, uninterruptedly,
   unvaryingly, usually, without cease, without letup,
   without stopping, year after year, yet