The Collaborative International Dictionary of English v.0.48:

Bridle \Bri"dle\, v. t. [imp. & p. p. Bridled; p. pr. & vb. n.
   Bridling.]
   1. To put a bridle upon; to equip with a bridle; as, to
      bridle a horse.
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            He bridled her mouth with a silkweed twist. --Drake.
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   2. To restrain, guide, or govern, with, or as with, a bridle;
      to check, curb, or control; as, to bridle the passions; to
      bridle a muse. --Addison.
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            Savoy and Nice, the keys of Italy, and the citadel
            in her hands to bridle Switzerland, are in that
            consolidation.                        --Burke.
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   Syn: To check; restrain; curb; govern; control; repress;
        master; subdue.
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