[1] : The Collaborative International Dictionary of English v.0.48

obsequious \obse"quious\, a. l. obsequiosus, fr. obsequium
   compliance, fr. obsequi, fr. obsequi: cf. f. obs'equieux,
   see obsequent, and cf. obsequy.
   1. promptly obedient, or submissive, to the will of another;
      compliant; yielding to the desires of another; devoted.
      obs.
      1913 webster

            his servants weeping,
            obsequious to his orders, bear him hither.
                                                  --addison.
      1913 webster

   2. servilely or meanly attentive; compliant to excess;
      cringing; fawning; as, obsequious flatterer, parasite.
      1913 webster

            there lies ever in "obsequious" at the present the
            sense of an observance which is overdone, of an
            unmanly readiness to fall in with the will of
            another.                              --trench.
      1913 webster

   3. see obsequy. of or pertaining to obsequies; funereal.
      r. "to do obsequious sorrow." --shak.
      1913 webster

   syn: compliant; obedient; servile. see yielding.
        1913 webster
see also:
obsequent obsequy yielding 

[2] : WordNet (r) 2.0

obsequious
     adj 1: attempting to win favor from influential people by flattery
            syn: bootlicking, fawning, sycophantic, toadyish
     2: attentive in an ingratiating or servile manner; "obsequious
        shop assistants"
see also:
bootlicking fawning sycophantic toadyish 

[3] : Moby Thesaurus II by Grady Ward, 1.0

70 moby thesaurus words for "obsequious":
   abject, adulatory, ass-kissing, backscratching, beggarly, bland,
   blandishing, blarneying, bootlicking, brown-nosing, buttery,
   cajoling, complimentary, courtierly, courtly, cowering, crawling,
   cringing, crouching, deferential, fair-spoken, fawning,
   fine-spoken, flattering, footlicking, fulsome, groveling, gushing,
   hangdog, honey-mouthed, honey-tongued, honeyed, ingratiating,
   insincere, insinuating, low, mealy-mouthed, mealymouthed, menial,
   obeisant, oily, oily-tongued, on bended knee, parasitic, prone,
   prostrate, servile, slavish, slimy, slobbery, smarmy, smooth,
   smooth-spoken, smooth-tongued, sniveling, soapy, soft-soaping,
   sponging, submissive, subservient, sycophantic, sycophantical,
   sycophantish, timeserving, toadeating, toadying, toadyish,
   truckling, unctuous, wheedling

Obsequious >> O Words
Obsequious, definition of term: Obsequious
obsequious_pag1.html