01 a. Frightful, shocking, or offensive to the eyes; dreadful to behold; as, a hideous monster; hideous looks.
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1.
Frightful, shocking, or offensive to the eyes; dreadful to behold; as, a hideous monster; hideous looks.
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2.
Distressing or offensive to the ear; exciting terror or dismay; as, a hideous noise.
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3.
Hateful; shocking.