The Collaborative International Dictionary of English v.0.48:

Intimation \In`ti*ma"tion\, n. [L. intimatio: cf. F.
   intimation.]
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   1. The act of intimating; also, the thing intimated.
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   2. Announcement; declaration. --Macaulay.
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            They made an edict with an intimation that whosoever
            killed a stork, should be banished.   --Holland.
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   3. A hint; an obscure or indirect suggestion or notice; a
      remote or ambiguous reference; as, he had given only
      intimations of his design.
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            Without mentioning the king of England, or giving
            the least intimation that he was sent by him. --Bp.
                                                  Burnet.
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WordNet (r) 3.0 (2006):

intimation
    n 1: an indirect suggestion; "not a breath of scandal ever
         touched her" [syn: hint, intimation, breath]
    2: a slight suggestion or vague understanding; "he had no
       inkling what was about to happen" [syn: inkling,
       intimation, glimmering, glimmer]