This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Arousing little or no interest or curiosity; boring.

adj. Arousing little or no interest; boring or uneventful.

Not interesting; not capable of exciting interest, or of engaging the mind or passions: as, an uninteresting story or poem.

Synonyms Dull, tiresome, tedious, wearisome.

adj. arousing no interest or attention or curiosity or excitement

adj. characteristic or suggestive of an institution especially in being uniform or dull or unimaginative

"An over-reliance on computer design software is weakening drawing skills among art students -- and resulting in uninteresting and uninspired work, according to college art professors."

dull    insipid    wearisome    tedious    jejune    soporiferous    ponderous    putdownable    irksome    pedestrian   

interesting   

dull    insipid   

dry    dreary    drearisome    arid    barren    flat    jejune    featureless    dry-as-dust    tasteless   

interesting   

monotonous    tedious    trivial    dreary    disagreeable    prosaic    insipid    unattractive    meaningless    bore