noun
EXAMPLES FROM CORPUS
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Caro said her stepbrother was Robert Marsh the naturalist.
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His stepbrother , half-scandalized and wholly impressed by Herbert's levity, never forgot the episode.
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I have five and a half stepbrothers and sisters.
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Shari struggles against her passionate feelings for her stepbrother .
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Some of them even had to endure the presence of stepbrothers and -sisters, which to Camille would have been insupportable.
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The notion that Caro's stepbrother was called something totally different niggled at her.
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Was it possible her friend had been matchmaking - her stepbrother and her best friend?
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Your son resents his stepbrother for taking up your time, and is worried that you don't love him any more.