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1. A child of one's spouse by a previous union.
2. Something that does not receive appropriate care, respect, or attention: "For the longest time, children's books ... were considered the stepchild of publishing" (Robert Sabuda).
n, pl -children
a stepson or stepdaughter
n., pl. -chil•dren.
1. a child of one's husband or wife by a previous marriage.
2. any person, project, etc., that is not properly treated, supported, or appreciated.
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|Noun||1.||stepchild - a child of your spouse by a former marriage|
child, kid - a human offspring (son or daughter) of any age; "they had three children"; "they were able to send their kids to college"
stepdaughter - a daughter of your spouse by a former marriage
stepson - the son your spouse by a former marriage