Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Detrimental; unfavorable.
Century Dictionary and Cyclopedia
- Attended with disadvantage; not adapted to promote interest, reputation, or other good; unfavorable; detrimental.
- Biased; unfriendly; prejudicial.
Wiktionary
- adj. Not advantageous.
GNU Webster's 1913
- adj. Attended with disadvantage; unfavorable to success or prosperity; inconvenient; prejudicial; -- opposed to
advantageous .
WordNet 3.0
- adj. constituting a disadvantage
Etymologies
- disadvantage + -ous (Wiktionary)
Examples
“Genov's resignation on August 24 2009 was telegraphed some days ago after a fallout with Energy Minister Traicho Traikov about Traikov's allegation that Kozloduy had sold power on the open market on terms disadvantageous to the nuclear power station.”
“Even where distinct vision would be 'disadvantageous' he half doubts if fusion comes to the rescue, or if even the color-wheel ever produces complete fusion.”
“disadvantageous" deal, saying that "the state will gain from the agreement, either directly or through royalties.”
“Keep your strawman arguments at home, Barb. and a man with 10 wives – disadvantageous as that is for the dog and the wives.”
“And if there is, I suppose you are ready to grant marital rights to a man with his dog, and a man with 10 wives – disadvantageous as that is for the dog and the wives.”
“Better to stress that this is only one isolated incident, being played up specifically since it is such a disadvantageous story for the pro-immigration side.”
The Volokh Conspiracy » Discourteous to Wear American Flag Images on Cinco de Mayo?
“Froufrou says: âHow would you rectify the prevalence of innate but deleterious (or disadvantageous) genetic traits?”
The Volokh Conspiracy » 1. Science, Faith, and Not Ruling Out Possibilities
“How would you rectify the prevalence of innate but deleterious (or disadvantageous) genetic traits?”
The Volokh Conspiracy » 1. Science, Faith, and Not Ruling Out Possibilities
“Any advantageous evolutionary change would have to exceed functional neutrality (zero) to the same extent that the wasteful disadvantageous junk exceeded zero in the opposite direction would it not?”
“I agree that they should not be forced to keep working for any particular amount of compensation they find disadvantageous or unfair.”
Lists
These user-created lists contain the word ‘disadvantageous’.
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Harmful
quick, hurtful, ruinous, noxious, destructive, deadly, mischievous, deleterious, baneful, injurious, baleful, malicious and 24 more...
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Underwordied
Words that, despite being rare, are hardly wordied.
lych gate, lych, rynt, vicinal, vicine, entheal, enthean, demoded, coextensive, miche, prosiliency, agalmatophilia and 119 more...
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words
absquatulate, conceivable, daylight, fuselage, necromancy, obsequiously, orotund, pusillanimous, tooth, abhor, abide, abscissa and 111 more...
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5-1
Hecko, words! Thanks for staying with me. :-)
avenue, viscous, zeroth, usher, scarcely, viability, snout, sole, purify, riotous, menace, moist and 364 more...
Tweets
Looking for tweets for disadvantageous.

Telofy Definitely!
And you might enjoy reading The Chaos for inspiration. Oct 23, 2009
Prolagus Another case of adjacent gauge? :) Oct 23, 2009
Telofy /dɪsædvənˈteɪdʒəs/
Are there native speakers who pronounce this /dɪsəd'væntədʒəs/?
(That’d be some consolation...) Oct 23, 2009