The Collaborative International Dictionary of English v.0.48:

Crown \Crown\ (kroun), v. t. [imp. & p. p. Crowned (kround);
   p. pr. & vb. n. Crowning.] [OE. coronen, corunen, crunien,
   crounien, OF. coroner, F. couronner, fr. L. coronare, fr.
   corona a crown. See Crown, n.]
   1. To cover, decorate, or invest with a crown; hence, to
      invest with royal dignity and power.
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            Her who fairest does appear,
            Crown her queen of all the year.      --Dryden.
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            Crown him, and say, "Long live our emperor." --Shak.
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   2. To bestow something upon as a mark of honor, dignity, or
      recompense; to adorn; to dignify.
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            Thou . . . hast crowned him with glory and honor.
                                                  --Ps. viii. 5.
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   3. To form the topmost or finishing part of; to complete; to
      consummate; to perfect.
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            Amidst the grove that crowns yon tufted hill.
                                                  --Byron.
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            One day shall crown the alliance.     --Shak.
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            To crown the whole, came a proposition. --Motley.
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   4. (Mech.) To cause to round upward; to make anything higher
      at the middle than at the edges, as the face of a machine
      pulley.
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   5. (Mil.) To effect a lodgment upon, as upon the crest of the
      glacis, or the summit of the breach.
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   To crown a knot (Naut.), to lay the ends of the strands
      over and under each other.
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The Collaborative International Dictionary of English v.0.48:

Crowned \Crowned\ (kround), p. p. & a.
   1. Having or wearing a crown; surmounted, invested, or
      adorned, with a crown, wreath, garland, etc.; honored;
      rewarded; completed; consummated; perfected. "Crowned with
      one crest." --Shak. "Crowned with conquest." --Milton.
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            With surpassing glory crowned.        --Milton.
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   2. Great; excessive; supreme. [Obs.] --Chaucer.
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WordNet (r) 3.0 (2006):

crowned
    adj 1: having an (artificial) crown on a tooth; "had many
           crowned teeth" [ant: uncrowned]
    2: crowned with or as if with laurel symbolizing victory [syn:
       laureled, laurelled, crowned] [ant: unlaureled,
       unlaurelled]
    3: provided with or as if with a crown or a crown as specified;
       often used in combination; "a high-crowned hat"; "an orange-
       crowned bird"; "a crowned signet ring" [ant: crownless,
       uncrowned]