The Collaborative International Dictionary of English v.0.48:

Indicate \In"di*cate\, v. t. [imp. & p. p. Indicated; p. pr. &
   vb. n. Indicating.] [L. indicatus, p. p. of indicare to
   indicate; pref. in- in + dicare to proclaim; akin to dicere
   to say. See Diction, and cf. Indict, Indite.]
   [1913 Webster]
   1. To point out; to discover; to direct to a knowledge of; to
      show; to make known.
      [1913 Webster]

            That turns and turns to indicate
            From what point blows the weather.    --Cowper.
      [1913 Webster]

   2. (Med.) To show or manifest by symptoms; to point to as the
      proper remedies; as, great prostration of strength
      indicates the use of stimulants. Opposite of
      contraindicate.
      [1913 Webster +PJC]

   3. (Mach.) To investigate the condition or power of, as of
      steam engine, by means of an indicator.

   Syn: To show; mark; signify; denote; discover; evidence;
        evince; manifest; declare; specify; explain; exhibit;
        present; reveal; disclose; display.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "indicating":
   connotative, demonstrative, denominative, denotative, designative,
   diagnostic, emblematic, evidential, exhibitive, expressive,
   figural, figurative, identifying, ideographic, idiosyncratic,
   implicative, indicative, indicatory, individual, meaningful,
   metaphorical, naming, pathognomonic, peculiar, representative,
   semantic, semiotic, signalizing, significant, significative,
   signifying, suggestive, symbolic, symbolistic, symbological,
   symptomatic, symptomatologic, typical