Britannica Dictionary definition of CUSTODY
[noncount]
1
law
:
the legal right to take care of a child (such as a child whose parents are divorced)
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She has sole custody of her daughter.
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The judge granted/awarded custody to the grandparents.
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The parents have joint custody. [=both parents have custody]
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a bitter custody battle [=a legal fight between divorced parents about who will take care of a child]
2
:
the state of being kept in a prison or jail
—
used after in or into
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Several suspects in the killing are in custody.
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He was taken into (police) custody last night and will be charged with murder today.
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The witness is in protective custody. [=is being kept in a safe place by the police]
3
formal
:
the act of protecting or taking care of something
—
often + of