The Collaborative International Dictionary of English v.0.48:

Associate \As*so"ci*ate\, v. t. [imp. & p. p. Associated; p.
   pr. & vb. n. Associating.] [L. associatus, p. p. of
   associare; ad + sociare to join or unite, socius companion.
   See Social.]
   1. To join with one, as a friend, companion, partner, or
      confederate; as, to associate others with us in business,
      or in an enterprise.
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   2. To join or connect; to combine in acting; as, particles of
      gold associated with other substances.
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   3. To connect or place together in thought.
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            He succeeded in associating his name inseparably
            with some names which will last as long as our
            language.                             --Macaulay.
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   4. To accompany; to keep company with. [Obs.]
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            Friends should associate friends in grief and woe.
                                                  --Shak.
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