half brother

• half-brother, halfbrother

From Middle English half-brother, equivalent to half- +‎ brother. Cognate with Dutch halfbroer (“halfbrother”), German Halbbruder (“halfbrother”), Danish halvbroder (“halfbrother”), Swedish halvbroder, halvbror (“halfbrother”), Icelandic hálfbróðir (“halfbrother”).

• (General American) IPA^(key): /ˌhæfˈbɹʌðɚ/

half brother (plural half brothers or half brethren)

1. A male sibling sharing a single parent, as distinguished from a full brother or brother-german, from a step-brother, or from a brother-like figure such as a blood brother.

• relative; sibling; half sibling, half-sibling

• (a half-brother sharing the same mother): uterine brother; maternal half brother, maternal half-brother
• (a half-brother sharing the same father): paternal half-brother

• half brother-in-law

• stepbrother