The Collaborative International Dictionary of English v.0.48:

Obsequy \Ob"se*quy\, n.; pl. Obsequies. [L. obsequiae, pl.,
   funeral rites, fr. obsequi: cf. F. obs[`e]ques. See
   Obsequent, and cf. Obsequious.]
   1. The last duty or service to a person, rendered after his
      death; hence, a rite or ceremony pertaining to burial; --
      now used only in the plural. --Spencer.
      [1913 Webster]

            I will . . . fetch him hence, and solemnly attend,
            With silent obsequy and funeral train. --Milton
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            I will myself
            Be the chief mourner at his obsequies. --Dryden.
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            The funeral obsequies were decently and privately
            performed by his family.              --J. P.
                                                  Mahaffy.
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   2. Obsequiousness. [Obs.] --B. Jonson.
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The Collaborative International Dictionary of English v.0.48:

Obsequies \Ob"se*quies\, n. pl.
   See Obsequy.
   [1913 Webster]