noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The brother of one's mother's husband (stepfather) or father's wife (stepmother). rare
2. 2
   The stepbrother of one's father or mother. rare

Etymology

From step- + uncle.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.