Noun
Any family having one or more stepchildren or stepparents.
Synonym: blended family
Hyponyms: stepparent, stepfather, stepmother, stepsibling, stepbrother, stepsister
The family of one's stepfather or stepmother; those immediate family members not related by blood.
Source: en.wiktionary.orgLast year, the 39-year-old Barbados native married a U.S. citizen, forming a stepfamily that included his two young U.S. citizen children and her two kids. Source: Internet
I laugh now at disastrous early attempts to merge my own 11-year-old stepfamily of six kids. Source: Internet