noun
stepbrother
noun
1
The son of one's stepparent from a previous relationship.
"My stepbrother lived with his mother until she remarried my dad."
How to Use Stepbrother
Learner’s notesIn plain EnglishA brother by marriage rather than by blood — your parent's new spouse's son.
Common mistake
A stepbrother is not related by blood, unlike a half-brother, who shares one biological parent with you.
Easily confused with
half-brother
Word Forms
stepbrothers plural, stepbrethren plural
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My _____ lived with his mother until she remarried my dad.